UPDATE TO THIS REVIEW: I want people to know that my opinion of Growpetz, as it compares to the Furminator, is even higher now than it was at the time I wrote this review. I realized after writing this review that, by using the Furminator first to comb my dogs--that this was probably the reason that the Furminator got 20% more hair (because there was simply more loose hair to 'get' the first time around). Again, both the Furminator and the Growpetz are FAR superior to other dog combs I have tried (for whatever reason, the perpendicular-angled comb works better than a flat comb). And again, the teeth to the Furminator (short hair) and the Growpetz are identical in length and shape, best as I can tell. Thus, in my opinion, given its lower cost and two bonus blades, the Growpetz is The Best Deshedding Tool out there and the one I recommend.*** I purchased this because I had misplaced my Furminator for a long time. I have now found my Furminator so I can compare the two combs, the Growpetz and the Furminator. Furminator makes 2 separate combs with different tooth lengths--one for short-haired dogs (fur less than 2" long) and one for long-haired dogs (fur more than 2" long). I own the one for short-haired dogs. Growpetz, to my knowledge, makes combs of only one tooth length. By tooth length, I'm referring to the teeth on the combs. The 3 attachments for the Growpetz all have the same length teeth. Best as I can tell, the teeth lengths of the Growpetz and the short-hair Furminator are exactly the same length and look identical to each other. I have only tested the 2 combs on two dogs. One dog, our own dog, doesn't really count because even though she's a pit bull/weimariner mix, when it comes to fur she's about as close to a Mexican hairless as any dog I've ever seen. I tried the combs on her just for the sake of doing it but I got zero fur on either comb. The second dog is my current foster dog--a mix, breed unknown, but whose fur is about 1/2" long, closer to an inch in some places. Of the two combs, the short-haired Furminator got about 20% more fur off the dog in the same number of strokes than the Growpetz tool did. However, both the Furminator and Growpetz combs are far superior at removing loose fur than a couple of old dog combs that I bought years ago and gave a try. To me, 20% difference is not a big deal, and Growpetz had the added advantage, along with being less expensive, of allowing me to experiment with 3 different sizes of combs. I think Growpetz' tool is worth 5 stars.
