I'll add my dissenting opinion... I have two Siberian Huskies, double-coated shedding monsters! One has a rougher/coarser guard hair coat, but both have seriously thick undercoats.

I bought a Furminator and tried it on both of them, it didn't do any better than the $11 undercoat rake that I normally use. In fact, on one of my dogs (the one with the finer guard hair) it was actually less effective than the rake. I think it's effectiveness varies from dog to dog, or at least depends on their coats.

Luckily, it comes with a money-back guarantee so I took it back to the pet store and got my $65 back!

-=kt=-