We've had a 980 Roomba for a year and a half now - it works flawlessly for the most part and is a huge improvement over our old 560 in every way Power toggles when it detects it's on a carpet, which is great. Of course, over time, the squeegees (rollers) have worn out, especially the dark gray one, which is lower and has more contact with the ground surface and therefore wears out faster. The robot still worked perfectly, but since the rollers were badly worn, I decided to buy a new set. I'm on