This is my first robot vacuum cleaner, so it's hard for me to compare it with others in terms of functionality. Perhaps analogues of other companies have similar problems with curbs. So I didn't downgrade my rating because of that. But the fact that the resource of the vacuum cleaner motor turned out to be less than the resource of the counter surprised me very much. I started googling this question and found out that this problem is with a lot of users of these vacuum cleaners. Surprisingly, there are few reviews on about this.