This set has some good stuff - Hepa filters, spare bags, even side brushes so I'm giving it two stars. I needed to replace one of my roller brushes so I bought this. The replacement (the front brush closest to the center) worked fine, but the outer brush made grinding noises on the linoleum portion of my floor. I tried a brush from another set; better but still noisy. It looks like the spare brushes are too big which makes them noisy. I put the old one back in and with the replaced front brush, Roomba works again. Next time I will order from another seller and just take roller brushes. If you need brushes, do not buy this product!