This Roomba 805 is much better than an early model Roomba that is about 10 years old. (The original one still works but I use it in different rooms.). Specifically this one is better at navigating, doesn't get stuck as easily, and doesn't get threads jammed up in the brushes like the old one did. Oh and this one has "Cliff Detection" which is great as it won't fall down steps! So far it is great.