Good product, much better than a brush classic dog but not sufficient. The "harvest" of hair is very impressive indeed, but my shepherd labrador cross (short black hair) always loses. So assuming that this is done correctly (about 1/2 hour every 4 or 5 days) there is loss of hair anyway, certainly less important but do not expect a miracle, too bad. Another point, sometimes my dog shows signs gene (or pain?) You have to go slowly and avoid going to the same place too often. Fast delivery. Cheaper than the store!