iRobot Roomba 900 series (Blairgowrie PH10)

Thoroughly cleaned and parts replaced (rollers, brush, filter). Works perfectly. Comes with homebase and lead, little box that sets up an electronic line the roomba won't cross. It also has a sensor to prevent it rolling over a 'cliff' (stairs). Also comes with spare filter and three spare brushes. Replacements can be bought cheaply on Amazon.

I'm only giving up on it because I have too much clutter on floors. It's easier for me to use a stick vacuum. It's never dealt with pets.