I bought this comb maybe a month ago, and I LOVE it! It's advertised to "knock out those knots" and I have to say it lives up to the claim. I find it breaks apart matts like butter...maybe that's why it is called a buttercomb. What I find is the matt is broken/sliced, and I can often "pull" it out by hand - at this point it is no longer "attached" so it is very gentle. I find myself using this comb in lieu of Les Pooches these days. In fact, I don't "brush" the girls, I now "comb" them. I highly recommend this product for help with matts.