For the price, this (I thought) could be a great machine. But the brush has teeth on one end that broke off the first time I tried to clean fur out of the head-now the birch doesn't roll and I can't find replacement parts to fit. Reading reviews online, brush not rolling seems to be a very common complaint. I thought this might be a better option to try Dyson, which has some design flaws when it comes to clogging with pet fur, but I'm going back to the more expensive Dyson, which I didn't have to replace after one year!!