Roborock Saros 20 Review: A Luxury Robot Vacuum Cleaner with Almost No Compromises

Robot vacuum cleaners have undergone a transformation in recent years that you wouldn’t expect from a “smart floor Roomba.” From primitive discs bumping into furniture, they have become machines that map apartments in 3D, wash their own mops, and you only have to empty their dust bag once a month at most. The Roborock Saros 20 is Roborock’s most ambitious attempt yet to raise this bar even higher — and after several days of testing in the editorial office, I can say that it largely succeeds.

Black and flat. Finally without a turret

The first thing you’ll notice about the Saros 20 is what’s missing from it. It lacks (just like the previous generation Saros 10R) a laser turret — that rotating cylinder on top that made older models taller and prevented them from going under lower furniture. Roborock replaced it with a fixed system of sensors built directly into the robot’s body, making the entire vacuum cleaner only 7.98 cm tall. In practice, this means it can easily fit under sofas, beds, and most coffee tables, where dust normally accumulates undisturbed for months.

The design is understated, all in black. No organic curves or contrasting elements — just a black disc that looks more like a large hockey puck. On top, you’ll find only two slots for clean and dirty water tanks, which are easily pulled upwards. The docking station is a bit more compact compared to some competitors, although it still takes up a piece of wall. On the front, it hides a dust bag and a cleaning solution tank under a panel.

It’s worth noting here that the previous generation, which I used at home for several months, looks almost identical. The most significant design differences include the matte front panel of the docking station (the Saros 10R had a glossy one) and a slightly rougher surface of the vacuum cleaner itself. Otherwise, you could easily mistake them.

Navigation that sees even lost Lego

The heart of the entire Saros 20 is the StarSight 2.0 navigation system, combining 3D Time-of-Flight sensors with an RGB camera. Compared to a classic rotating laser, it offers significantly denser spatial scanning — Roborock states a 21x sampling frequency compared to traditional LDS systems. In translation, this means the robot maps the environment much more detailed and faster. The manufacturer declares recognition of over 300 types of obstacles, starting from a size of just 2 × 2 cm.

During testing, I was surprised by how well the Saros 20 handled a real environment full of pitfalls. Charger cables, a sock forgotten under the couch, a child’s toy in the middle of the room — the robot reliably avoided them without running over them or getting tangled. Occasionally, it lightly touched thin chair legs, but it never resulted in getting stuck. Compared to previous models, this is a noticeable improvement and it’s actually the main thing you expect from a flagship robot vacuum cleaner — that you just turn it on and don’t have to check anything after it.

Navigation is complemented by VertiBeam technology, which measures the distance from walls and furniture using side light patterns. Thanks to this, the vacuum cleaner cleans tightly along baseboards and furniture legs, which is precisely the area where classic vacuum cleaners leave a strip of dust behind. In combination with the extending side brush, edge cleaning works noticeably better than I was used to.

Chassis that can climb over even a two-layer threshold

Anyone who has owned a robot vacuum cleaner knows that moment: the robot reaches a threshold, desperately tries to cross it, struggles for a while, and eventually gives up. The AdaptiLift Chassis 3.0 radically solves this problem. In addition to its main wheels, the Saros 20 has auxiliary “arms” that extend when needed and lift the entire robot. Thanks to this, it can overcome two-layer thresholds with a total height of up to 8.8 cm (4.5 + 4.3 cm), which covers the vast majority of apartment transitions.

In practice, it looks a bit curious — the robot approaches the threshold, stops for a moment as if thinking, and then gradually starts to lift itself. The whole process takes a few seconds and looks somewhat laborious, but the main thing is that it works. Our test threshold in the bathroom, which previous vacuum cleaners regularly capitulated on, the Saros 20 conquered every time without hesitation. After a few passes, it also remembered the route and crossed it more smoothly.

The same mechanism applies to carpets. When the robot drives onto a high-pile carpet, it lifts the entire chassis — not just the mops — thereby stabilizing the brush’s contact with the surface and improving airflow. It handles carpets with pile up to approximately 3 cm, which covers most common household carpets.

36,000 Pa suction: power you’ll feel

With the Saros 20, Roborock has implemented a HyperForce motor with a suction power of 36,000 Pa, which is almost double that of last year’s Saros 10R. On paper, it sounds like marketing’s “our number is bigger,” but in practice, the difference is noticeable. On hard floors, the vacuum reliably picks up even finer dust from between floorboards, and on carpets, it extracts dirt that earlier models left beneath the surface.

The main brush is split (DuoDivide) and designed so that hair doesn’t get tangled in it — after each cleaning, we didn’t have to untangle anything from the brush, which you’ll appreciate in a household with a pet or long-haired individuals. The FlexiArm side brush then extends towards the wall and reaches into baseboard gaps from a height of 2 cm, so even that strip of dust under the kitchen counter will finally disappear.

The vacuum cleaner supports four levels of suction power and can automatically switch to maximum in carpet settings. We recommend setting the suction permanently to a higher level — the difference in noise is marginal, but the difference in floor cleanliness is noticeable.

Mopping: solid, not miraculous

The Saros 20 uses two rotating mops operating at 200 revolutions per minute with adjustable pressure from 8 to 13 N depending on the degree of dirt. In normal operation, mopping is very decent — without visible streaks, with even coverage of the area. It can remove dried stains, but for truly stubborn ones, it sometimes needed to pass over them multiple times or required manual assistance.

A pleasant feature is StainTarget — the robot uses AI to recognize wet stains on the floor, automatically switches to mopping mode, and lifts the brushes to avoid spreading dirt. During our testing, this worked reliably, although switching modes took a moment.

The TripleLift system allows independent lifting of the chassis, main brush, and both mops. On carpets, the mops automatically lift to prevent moisture transfer. In pure vacuuming mode, you can leave the mops directly in the docking station, and the robot will set off without them — this is a practical detail that previous generations couldn’t solve so elegantly.

The station that does the dirty work for you

The RockDock docking station is essentially the second half of the entire product. After each cleaning, it automatically empties dust into a bag (capacity for approximately 65 days of operation), washes the mops with water heated up to 100 °C, and dries them with warm air at 55 °C. Compared to previous models, where mops were washed at 75–80 °C, this is a noticeable improvement in hygiene — and more importantly, after a few weeks of use, you’ll notice that the mops truly don’t smell.

Drying now applies to the entire air circuit of the station, not just the mops, so mold should not form even in the tanks. The station also has automatic detergent dispensing — just fill the tank, and it will take care of the ratio itself. However, be careful when choosing a cleaner: Roborock warns against products that foam too much, as they can clog the internal hoses.

Saros 10R (left) vs Saros 20 (right):

One criticism: emptying the dustbin is quite noisy. Not that it takes long — a few seconds and it’s done — but the sound is intense and definitely won’t be a pleasant surprise in a smaller apartment. Pumping water during mop washing is similar. These are transient sounds, but if you have the vacuum cleaner scheduled for nighttime hours, keep that in mind.

App and smart home

The Roborock app has long been one of the best you can find in the robot vacuum cleaner segment. After the initial mapping of your home, you can name rooms, set no-go zones, create invisible walls, and schedule cleanings with room-specific precision. Furthermore, the SmartPlan 3.0 feature learns your habits and gradually adapts the cleaning schedule and intensity to the room type.

We appreciate the option to choose the “vacuum first, then mop” mode directly from the main screen — with previous models, this required creating custom routines, which was unnecessarily cumbersome. Here, you simply tap on your preferred mode, select the rooms, and off you go.

The Saros 20 supports the Matter standard, allowing it to work with Apple HomeKit, Google Home, and Amazon Alexa without the need for proprietary connections. Basic commands like start, stop, or return to dock thus work across platforms, but more advanced features like mapping and zone planning remain within the Roborock app. For home automation enthusiasts: the vacuum cleaner also works with Home Assistant, although full integration requires some technical knowledge and willingness to delve into YAML configurations.

What could be better

Despite excellent navigation, the Saros 20 occasionally lost its orientation under the bed, where multiple items are stored, and circled in place for a while before finding its way out. This isn’t a frequent problem, but it’s worth mentioning — especially if you have storage boxes under your bed. The robot also sometimes tried to “climb over” low objects like a small toy car or a bowl, which in its logic appeared to be a threshold. After a few attempts, it learned everything, but the first few days with it require a bit of patience.

Battery life is average. With standard settings (medium suction, single cleaning), the vacuum cleaner managed approximately 74 m² on a single charge, which is sufficient for most apartments, but for larger homes, you won’t avoid interruptions for recharging. The 6,400 mAh battery fully charges in approximately 2.5 hours.

Price: high, but appropriate

The Roborock Saros 20 is sold in the Czech Republic at a recommended price of 36,999 CZK. As part of an introductory offer, valid until April 8, 2026, it is available for 33,299 CZK. This is not a small amount, but considering what you get for the money — top-notch navigation, threshold climbing, high suction power, an automated station with hot water mop washing, and Matter support — it’s a sum that makes sense. You’re not paying for marketing here, but for genuinely functional technologies that save time and nerves in daily use.

Final Verdict

The Roborock Saros 20 is not a revolution — and that’s perfectly fine. It’s a consistent evolution where every single aspect has received a visible improvement. Navigation is more reliable, suction power is higher, threshold crossing finally works without compromise, and the station takes care of itself so well that you’ll forget about it for weeks. It’s not a vacuum cleaner that will give you a “wow” moment from one groundbreaking feature. It’s more a machine where, after a month of use, you realize you’ve barely touched it — and yet the floor is clean.

If you have an older robot vacuum cleaner at home and are bothered by thresholds, poor navigation, or insufficient performance on carpets, the Saros 20 convincingly solves these problems. Owners of last year’s Saros 10R, however, should carefully consider an upgrade — while differences exist, they are not so dramatic as to justify another investment. For everyone else looking for a flagship robot with minimal compromises, the Saros 20 is currently one of the best candidates on the market.

Editor’s rating: 93 %

Do you have a robot vacuum cleaner at home, or do you still prefer traditional vacuuming?