Very effective. Having had two German Shepherds and Labrador, I saw since I have this brush contrast, the videos on the internet it takes some time (half an hour) to arrive at a correct result the first time. But the more you repeat the sessions and I put less time to get something decent (it was time that I buy this brush). I use it on my Labrador bitch who really does not like being brushed with Furminator is the same, but at least now when I brush, I really harvest much dead hair as well hard hair above that sub -poil the space suddenly brushing sessions. My house is much less overrun hair and when I caress the hair hardly fly and yet it is in full moult. For cons, I took the model with the stroller to remove the brush bristles, which is totally unnecessary as inefficient to release the bristles of the brush but it really is not serious because the hairs can be removed very easily in a micro second with the hand.