I absolutely love my iRobot 9s, but the overpriced poor quality rubber brushes would actually make me question repurchasing another iRobot vacuum. The brushes tear easily (especially the dark green brush) and if you get a long hair wrapped around it, they cut it in half. I clean my vacuum after every use, so this is not a maintenance issue on my end. Once this happens to the brush, it does not vacuum as well. I have to replace these VERY expensive brushes every 2-3 months...crazy! PLEASE, fix this issue and redesign the brushes to be more durable.