Test results:
17.5mm with a sharp edge: Easy pass.
20mm with a sharp edge: Fail.
You need to measure your steps accurately. Mine's quite an old model. Newer ones may be more athletic.
Have the i7+. It has the self emptying bin. Except for a few hiccups, has run very nicely. You can program it and it runs like clockwork.
Now if only it has a mopping option.
Folks have the Mi Robot Mop. That seems to do both. Good enough at 1/3rd the cost.
Last time (October 2020) I was looking at them can't recall they had camera. Just LIDAR (laser stuff). Some Roomba has cameras which is blurred, but still camera, thanks but no thanks, I've found some pics from early models and noped out of there. I'm not happy with devices having access to internet, but vaccuming is more trouble than someone knowing my floor plan. Otherwise I like my appliances stupid eg offline.
I have xiaomi mi (I think that's first gen, whichever name that is), one of the old ones, had for like almost 2 years (2017-2019), then lidar died, guarantee was yeah I should send it to them in Poland or somewhere, then I bought the same one again since I was happy with it when it works.
I don't use it too often, but it's ok. Saw lidar going crazy one day recently, but it didn't repeat itself. Yet.
Bought roborock s6 as a present, folks are super happy with it. Using both options.
When this mine dies, I'll go for roborock, whichever will be most affordable at the moment. Even one per year is still cheaper than paying someone else do it.
I also have irobot 390 or whichever, the one that has towels which can be washed, and it's ok, changed battery once already, otherwise good. Not for dirty wood floors though (like juice spot that dried unnoticed and caught dust), it's too light to give proper pressue. But in bathroom you can soak and then it doesn't need pressure, just more passes to clean whatever you throw there.
In 2017 I dug heavily to see where I get most value for money, in 2019 and 2020 I revisited my decisions, and so far, xiaomi/roborock is leading.
You just have to be realistic, and if you have carpet - just remember that with classic vaccum you pass over same spot a bunch of times - so if you give the robot many passes, you'll get the same level of cleanliness.
But not from one pass alone. They're designed to work daily.
If I don't vacuum for a week, I then order 2 or even 3 passses back to back. Yes, I have to empty bin even mid first pass, but works just fine.
I have 2 cats. So I throw like 1-2 kittens from all those hair
Before I got cats, I had robot on schedule, but wasn't wise to continue to do it when I got a cat with chronic diarrhea and accidents all over the place. After cat got under control after several months, I just got lazy with robot and now run it once a week or so, but several times. So it can work in that regime, you just need to be aware of its capabilities.
Neato maps as it goes using lidar. its extremely accurate based on the map on the smartphone. think they've always been way ahead on the tech. just not so heavily marketed. rarely needs any intervention.