I did extensive research before deciding to buy the Furminator off of Amazon. There was a lot of stuff out there about "counterfeit" Furminators from China that didn't work properly. This made me nervous, but when I got mine and tried it out, it worked perfectly. I have three cats who all had dandruff issues, and now they have zero dandruff and very shiny, soft fur. I would say that you have to be careful not to press down too hard, or go overboard the first time when you see all the fur flying everywhere, because it will thin your pet's hair out quite a bit. Definitely not worth spending $60 in store on the "custom" cat one! Order from Amazon!