Saros 20 Sonic
3 independent reviewsRead the findings →A very low Roborock that cleans carpet superbly and climbs door thresholds better than almost anything. It suits carpeted homes where mopping is light upkeep. Its vibrating mop pad is weak on dried-on stains.
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What reviewers found
Three tests so far: Vacuum Wars in its studio, Senses.se at home with the Complete bundle, and SmartHomeAssistent on a scored test course. All three rate the vacuuming and threshold climbing highly. The mop splits them: Senses was impressed, while the other two found it weak on stubborn stains. Senses also hit a self-emptying fault that nobody else reported. So it's strong on carpet and tall doorway thresholds, but the mop is the weak link for dried-on spills.
Vacuum Wars, hands-on · Senses.se, hands-on, Jun 2026 (tested on the Saros 20 Sonic Complete (bundle, same robot)) · SmartHomeAssistent, hands-on, Jul 2026
Hard floors
Reviewers rate it highlySmartHomeAssistent measured near-perfect pickup on laminate, and Vacuum Wars found it collected debris of all sizes from hard floors, with the split brush steering it into the intake.
Carpet and rugs
Reviewers rate it highlyA strong point. Vacuum Wars rated its carpet deep-cleaning well above average, and SmartHomeAssistent gave its vacuuming top marks, with strong results on ordinary and deep-pile carpet.
Pet hair
Mixed resultsLong hair doesn't wrap round the brush, Vacuum Wars found, but it lifted compressed pet hair from carpet a little below average. SmartHomeAssistent saw hair fully removed from hard floors and ordinary carpet.
Mopping
Mixed resultsFine for light grime, weak on set-in stains. Senses.se found it cleared everyday dirt in one run, but Vacuum Wars and SmartHomeAssistent both found dried-on test stains mostly left behind.
Navigation and obstacles
Reviewers rate it highlySmartHomeAssistent saw it spot almost all its test objects, Vacuum Wars rated its avoidance above average, and Senses.se never had it tangle in a cable. It still missed a few things, so tidy leads first.
Dock and upkeep
Mixed resultsVacuum Wars rated the dock among the most comprehensive available. Senses.se found it sometimes failed to empty the robot, which then carried on cleaning and spreading dirt with no warning in the app.
App and software
Reviewers rate it highlyVacuum Wars counts Roborock's app among its favourites for its mix of simple modes and deep controls, and Senses.se found it good and easy to navigate, though managing several floors was clunky.
Noise
Not enough evidenceOnly Senses.se commented on noise, finding the dock almost silent apart from a loud start to the emptying cycle.
Reliability and support
Not enough evidenceNo qualifying review ran it long-term. Senses.se hit an emptying fault that no other tester reported.
Value
Mixed resultsSenses.se called the Complete bundle great value, helped by six months of included consumables. Vacuum Wars felt its mopping fell short of what it expects at this price.
Verdicts come from independent, hands-on, finished reviews. An area needs at least two of them before we say more than “Not enough evidence”. We don't score robots ourselves. How this works
The mop is the compromise
Vacuum Wars measured weaker mopping than the standard Saros 20, and SmartHomeAssistent left much of its stubborn test staining behind. Senses.se was more positive about everyday dirt. So the Sonic should cope with a routine wipe, but in the head-to-head the standard model did better on dried stains. Check which mop system the model you're looking at uses before you buy.
Excellent vacuuming, especially carpet
SmartHomeAssistent gave vacuuming its top grade, with near-perfect pickup on laminate and strong results on ordinary and deep-pile carpet. Vacuum Wars measured 92% on its carpet deep-clean test, well above the 78% average, and found no hair wrapped round the brush. The soft spot was embedded pet hair in carpet: Vacuum Wars measured 78%, a little below average, while SmartHomeAssistent saw hair fully removed from hard floors and ordinary carpet. If you have a moulting dog, treat it as good rather than best-in-class.
Gets over doorway thresholds others can't
Vacuum Wars saw it cross a 5.7cm single rise, and SmartHomeAssistent got over 5cm. Roborock's 8.8cm claim is for a threshold with two rises, so it isn't a like-for-like figure. Senses.se reported successful crossings that sometimes took several minutes of retries. Look at the shape of your thresholds as well as their height, and allow for the odd slow crossing when you set a schedule.
Good at dodging clutter
SmartHomeAssistent spotted 15 of its 16 test objects, and Vacuum Wars recorded 19 of 24 obstacles avoided. Senses.se never had it tangle in a cable during testing, though it did mistake rug fringes for extra dirt and made pointless extra passes. That's a better showing than most robots manage, but it isn't perfect, so a quick tidy of socks and charger leads is still worth doing.
Small bin, and one emptying fault
Vacuum Wars measured a small 228ml onboard bin, so the dock needs to empty it reliably. Senses.se had occasions where emptying failed and the robot carried on, spreading dirt, without any warning in the app. Nobody knows why or how often it happens, and one report doesn't make it a model-wide fault. Check the bin has actually emptied, and contact support if it hasn't.
This covers the vibrating-pad Saros 20 Sonic only. Senses tested the Complete bundle, which adds spare consumables. The rotating-mop Saros 20 and the roller-mop Saros 20 Flow are different models.
Our take
Should you buy the Saros 20 Sonic?
Best for: Homes where raised door thresholds strand other robots. Skip it if: Dried kitchen stains are your main cleaning problem.
Consider the Sonic for a carpeted home with raised thresholds if mopping is mainly light upkeep. In Vacuum Wars’ comparison, the standard Saros 20 removed dried stains much better. Compare the exact models and current offers before paying extra for a feature you will rarely use.
The Sonic differs from the standard Saros 20 in both mopping and navigation. It uses a vibrating pad that extends towards edges and a retracting laser turret. The standard model has spinning pads and a turret-free navigation system. Check availability for the exact Sonic variant in your market.
All three testers rate the vacuuming and threshold climbing highly. SmartHomeAssistent gave vacuuming its top grade, and Vacuum Wars measured 92% on its carpet deep-clean test, though it found embedded pet hair a little below average. Vacuum Wars and SmartHomeAssistent both logged climbs of around five centimetres, and Senses.se found it gets over tricky thresholds but sometimes spends minutes backing up and retrying. The mop is the compromise. Senses.se said the pad removed basically everything on its first run over everyday dirt, but Vacuum Wars and SmartHomeAssistent both used dried-on test stains and found them mostly left behind. Senses.se also had the dock sometimes fail to empty the robot, which carried on cleaning and spreading dirt with no warning in the app. No other tester saw that.
Before you buy
The questions people ask about this one
Is the vibrating mop as good as spinning mops?
Not on tough stains. Vacuum Wars gave it a clearly lower mopping score than the standard Saros 20 with its spinning pads, and SmartHomeAssistent rated it unsatisfactory on stubborn marks. Senses.se found it fine for everyday dirt. If mopping matters most, the Saros 20 is the safer choice.
Does it fit under low furniture?
Very likely. It's 7.98cm tall and can squeeze down to 7.95cm with the laser lowered, per the specifications, and Vacuum Wars measured about the same. Measure the gap under your sofa first; plenty of rivals need 10cm or more.
Can it get over rugs and the raised strips between rooms?
Very well. Vacuum Wars measured a 57mm climb and SmartHomeAssistent recorded 5cm, both top results. Senses.se noted it can take a few minutes to work its way over awkward thresholds, pushes thin rugs about, and treats rug fringes as extra dirt.
Will it avoid cables and pet mess?
Better than most. SmartHomeAssistent found 15 of 16 test objects, Vacuum Wars avoided 19 of 24, and Senses.se had no cable tangles. It still missed some things, so tidy loose leads and don't leave it alone with a pet accident.
What still needs emptying or refilling?
Roborock's claimed 65-day bag interval only covers dust. You still refill clean water, empty dirty water and clean the washing area. The robot's small onboard bin needs checking too, as Senses.se had emptying fail with no warning in the app. Follow the maintenance schedule and adjust it to how much you clean.
Alternatives
Other robot vacuums to compare.
Saros 20
Why consider it: Same low body and climbing claims, with spinning mops that scored far better on stains in Vacuum Wars' tests.
The compromise: It has no laser turret, and RTINGS found its obstacle avoidance inconsistent, especially on carpet.
Saros 10
Why consider it: The same pop-down laser idea a generation earlier, and testers found it great with pet hair and dependable over months.
The compromise: It also uses a vibrating mop that needs higher settings for dried stains, and it climbs lower steps.
X60 Pro Ultra Complete
Why consider it: Cleaning power, obstacle-crossing hardware and the dock are consistently praised.
The compromise: Reports of getting stuck, long cleaning times and high water use make it less effortless than the spec sheet suggests.
Specs
Full specifications
Each specification names its source. Manufacturer claims are not independent test results; unconfirmed figures are labelled.
Owner reviews
Do you own the Saros 20 Sonic?
Tell people how it’s held up: cleaning, maintenance, faults and support. Owner accounts are shown separately from independent reviews.
Sources
Where this page’s findings come from
Editorial reviews
- Vacuum Wars: Roborock Saros 20 Sonic Robot Vacuum Review: Strong Performance with One Major Tradeoff ↗Hands-on
- Senses.se: Roborock Saros 20 Sonic Review: Incredible Mopping and High-Threshold Mastery ↗8.0/10Hands-on · Tested on the Saros 20 Sonic Complete (bundle, same robot)
- SmartHomeAssistent: Roborock Saros 20 Sonic test ↗2.3 (gut — good; 1 is best, 6 is worst)Hands-on
Sources
Videos
- Search YouTube for Roborock Saros 20 Sonic ↗Search results may include company demonstrations or similar models. Check the source and model name; a demonstration is not an independent performance test.