I own a 880 and 760 and I could not be happier with both of them. I had the 760 for over a year, but it couldn't properly do my entire upstairs (its rather large). So I moved it to my two room downstairs and bought the 880. With the 880 it comes with lighthouses that signal the roomba to know to do each room separately. I can not be happier. The 880 was a great upgrade too, the brushes are easier than ever to clear and maintain (basically you don't have to).