Works almost as good as the first canister that was available in the US back in 2007 due to a motor actually powering the brush roller as opposed to the roller being powered only by the suction strength. So far no tangled hair on the roller brush at all and I have two large dogs and mostly carpet. I have gone through 3 different Dyson vacuums trying to find one that's as good as the first canister vacuum they offered in the US and this one so far is comparable to it even though it's an upright.
It is a little on the heavier side but you can now adjust the carpet setting on the powerhead which helps. It also seems to pick up the fine dust in the carpets very well!!!