This robot is blind, he navigates randomly in the rooms of the apartment and will not suit more than 75 m2 in my opinion, being effective by repeated passages. I have 73 m2 on two levels, so this is perfect for me.
It will facilitate his passage, remove the chairs, flared foot stools, etc, but overall it sucks very well and goes everywhere. He finds his base without much problem, it still must the room is cleared.
Concerning the noise, it is not more than my older model iRobot, is very correct in my opinion.
The product interface is correct, since it has no screen, and the remote control does not seem more intuitive. Personally I press "On" and it does its job. It requires a minimum of maintenance at the brushes and should be emptied frequently, its capacity is limited.
The virtual wall provided does its job but is not the easiest to locate. Dirt Devil to thank you for the added explanatory sheet next to the record.
In conclusion, I will say that for the price I paid I could not be better, this model is very honest and effective as more expensive robots than him. I only have hard floors and two levels of less than 30 m2 where it makes his job very well.
Now it remains to see its behavior in time, I will update my review in some time.