I admit I was sceptical and the little thing did seem like it was going randomly around the living room. I was also affaid it would start denting the dishwasher, sub-zero and the furniture. I am glad to report that I have not noticed anything after a week. I do have a clean house and each time I clean out the filter, its full. Its amazing where it keeps finding so much dirt. I'll attribute it to my two dogs. By the way, they dont seem to mind the roomba whirling around unlike their nemesis the conventional vacuum cleaner.Scheduling feature is great although its probably easy enough to just hit the clean button as you are leaving the house.