On weekends I use Roomba to vacuum about 1500 m². feet carpet. After installing replacement roller brushes in my Roomba, I used them for two weeks before the light green roller was completely smooth. The filters and bags seem to work well, but the side brushes are too long, get stuck under the wheel and sometimes stop spinning. They just need to be completed. Now I get my videos from iRobot! (Edit: iRobot order already placed!)