I think it works well?
The part pushing the hair up for removal works great. It pushes it ALL the way to the end, ie where you can't feel the bristles at all when the plastic flat is all the way extended, so it doesn't get stuck at the edge like it does on some brushes I've had. However, my cat doesn't seem to like it very much? He keeps trying to bite at it or getting riled up when I use it. It also doesn't seem to remove as much hair as I'm used to from brushing other cats with other brushes before. He doesn't seem in pain, so maybe it's just him thinking everything is a toy.
Rating: 4 stars