I researched the Roomba vacuums for a year before deciding to buy one. The reviews ranged from excellent to a dud, so I was being cautious. I bought my first Roomba 560 from Overstock last month. It has worked flawlessly and I've been very happy with it. I just purchased a second one this month (Feb 2009).Whenever Hazel cleans (yes, we finally gave it a name because she seems to talk to you in musical tones), we clean out the dirt bin and brushes each time. I have two dogs that shed daily year-round, an Aussie and a Border Collie/Sheltie mix, plus a cat. Our floors have never been cleaner. I can rub my hand across the hardwood and there is no grit or dirt. Cleaning the vacuum only takes 5 minutes and is less work in our opinion than an upright with a bag or bagless cup. We've noticed less dust in the house, which I believe is because underneath the furniture is clean and less dirt and fur floats around the floor. It also cleans our area rugs with fringe without any trouble, even the one the dogs lay on most of the time.The dogs were afraid and would bark as this little creature rolled across the floor, but after about 5 cleanings they now just get out of the way. My Aussie is sensitive to most household noises (she was a rescue dog) and even she is now ignoring the Rhoomba.The only reason I rated durability as 4 stars instead of 5 is the maintenance of the dirt bin, brushes and filter. It isn't difficult or timely but it takes slightly more effort than an upright. One advantage I do like is the small amount of space needed to store the Roomba in an obscure corner.