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I have an Eufy one, a G30 I think. It's good for the money (couple of hundred quid) and gets used most days. It's not as good as the fancy Roomba one I briefly owned but that cost a lot more and I'm not convinced all the bells and whistles are worth it unless you live in a place that is all on one level and the floor is always uncluttered.
On the floor they are good, obviously they can't clean your skirting boards, get into crevices, etc (but they can get under your bed, sofa, etc).
More expensive ones you can program to do stuff. A roomba one I had generated a map of your property and you could label different rooms and areas. Obviously only useful if your place is all on one level and your floor is always tidy. I didn't think the price premium was worth occasionally carrying it into the room, closing the door and pressing go.
They will all cover your whole house but cheaper ones do it a bit randomly, more expensive ones will generate a map and follow that.
I also came across this important view point when searching for my previous comments:
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Not really a kitchen appliance but...
What are Roombas and their copies like? Our vaccuum has been broken a few times and is on its last legs so I was thinking about getting a robot cleaner instead.
How effective are they compared to proper vacs?
How are they with *cough pet *cough hair?
Can you program them to do certain rooms at certain times?
Do they learn your whole house and actually cover it?
What's the best bang for buck version? They seem to go from £100-£1000!
https://www.amazon.co.uk/Lefant-Cleaner-Robotic-Suction-Self-Charging/dp/B09WMV9MQK/
https://www.amazon.co.uk/iRobot-Roomba-connected-Automatic-Disposal/dp/B08377KZTT/
Any that are good at carpet, laminate and tiles?