Luxury robotic vacuum cleaner in a huge sale: Roborock Saros 20 will impress you with its capabilities

The Roborock Saros 20 arrived in the Czech Republic this March with a price of 36 999 Kč, and even among premium robotic vacuum cleaners, it was one of the more expensive ones. Since then, it has been discounted a few times to around 26 thousand, but now, as part of Black Friday, it has dropped even lower. Alza is selling it for 20 399 Kč, which is almost half the price of its launch. For that price, you get a robot that, according to the manufacturer, can handle a two-step threshold, fits under a couch, and has its mops washed with hot water after cleaning.

Quick summary:
✅ It makes sense in an apartment or house with thresholds and low furniture, where you want to vacuum and mop with minimal maintenance.
⚠️ Consider that the station is noisy when emptying, and the initial mapping of the apartment, according to customers, takes several runs.
💡 At 20 399 Kč, the Saros 20 has never been cheaper on Alza, according to HlídačShopů.

Handles two-step thresholds up to 8.8 cm and fits under a couch

The biggest draw of the Saros 20 is its AdaptiLift 3.0 chassis. The robot can lift itself on it, and the manufacturer promises it can overcome a two-step threshold with a total height of up to 8.8 cm (4.5 + 4.3 cm). A single step must therefore not be higher than approximately 4.5 cm. On carpets, it lifts the mops, and according to customers, it can leave them in the station during vacuuming itself.

The second significant change is that the robot does not have a rotating laser turret on its back. This means it measures only 7.98 cm and fits under most beds and sofas. Instead of a laser, the space is scanned by the StarSight 2.0 system, which combines 3D sensors with a camera and, according to the manufacturer, can recognize over 300 types of obstacles from a size of 2 × 2 cm. Note that the listing on Alza mentions „laser and LiDAR navigation“. However, this model does not have a classic rotating LiDAR.

The suction power is 36 000 Pa, and the main brush is split to prevent hair and pet fur from getting tangled. The RockDock station empties dirt into a bag, which, according to our review, lasts approximately 65 days, refills water into the robot from its tank, and dispenses cleaning solution. However, you refill the clean water into the station yourself. It washes mops with water heated up to 100 °C and dries them with air at 55 °C, so they should not smell. The robot can be connected via Matter to Apple Home, Google Home, and Alexa.

It received 93% in our review

My colleague Jakub Kárník had the Saros 20 at home in the spring and, in his review, called it one of the best robotic vacuum cleaners on the market. He was most impressed by its navigation and obstacle recognition. In the test, the robot avoided even small items like Lego bricks and handled two-layer thresholds. The high suction power was especially noticeable on carpets, and the split brush truly remained free of tangled hair.

Mopping in the review was solid, but not miraculous. A feature that uses AI to recognize wet stains helps, although it takes the robot a while to switch to the correct mode. According to Jakub, the station does most of the dirty work for you.

There were also reservations. Both dust emptying and water pumping in the station are loud, although emptying only takes a few seconds. The robot sometimes got lost under furniture with stored items, the side brush cannot be lifted (only extended), and battery life on a single charge is approximately 74 m² with standard settings. In a larger house, the robot will have to recharge between cleanings.

Customers praise mopping, criticisms target mapping

On Alza, the Saros 20 has a rating of 4.5 out of 5 from 14 customers, 79% of whom recommend it, and over a thousand units have been sold. Alza reports a return rate of 1.52%. Most often, people appreciate the mopping (one customer writes that it can even handle dried stains), as well as the quiet operation during vacuuming and the simple maintenance of the station. One customer highlighted that she finally doesn’t have to deal with a ramp for thresholds.

Criticisms mainly come from people who switched from an older Roborock with a laser turret. Two of them write that the first mapping takes several passes, and one also claims that changing the map erased his scheduled cleanings. The same customer complains about lengthy and loud attempts to cross thresholds and smaller water tanks that last him for about one and a half cleanings. Another had problems with thresholds over 3 cm, even though the robot eventually overcame them; another mentions mop drying taking around three hours, and one owner claims that the mop does not extend near walls. Two people point out that voice control does not work in Czech (the app and robot’s announcements are in Czech).

When is a cheaper model more worthwhile for you?

If you don’t have thresholds or high carpets at home, you won’t utilize one of the main reasons to buy the Saros 20. Additionally, satisfied owners of older Roborocks with laser navigation should be aware that, according to some customers, the new robot will take some time to learn the apartment. And those who want to clean at night might encounter the noise of the station and attempts to cross thresholds.

Households with thresholds and pets benefit the most

For 20 399 Kč, at the time of writing, you get one of the best robotic vacuum cleaners we have tested, and it has never been cheaper on Alza. It makes sense especially in an older apartment or house with high thresholds between rooms, where previous robots would get stuck. Dog and cat owners will also appreciate it, as the split brush does not tangle fur, and the mops wash themselves. And if you have low beds and sofas, the robot can get under them thanks to the missing turret. You can now buy the Saros 20 on Alza for 20 399 Kč, but for those living in a small apartment without thresholds, a cheaper model will likely do just fine.

For completeness, let’s add that on Heureka, at the time of writing, you can also find the Saros 20 from 18 711 Kč, which is roughly 1 700 Kč cheaper than on Alza. If every crown matters to you, it’s worth comparing offers, but don’t forget to check shipping and warranty conditions for the specific store.

Would you buy a robot that can climb over high thresholds for 20 thousand?