I never have tried that shampoo because with all the raves about it, I have heard a lot of negatives about it too.
I think with any shampoo....no matter what people say about them...it is all trial and error...you have to try it to see if you like it....not just how it works or smells, but how it effects your Yorkies skin/coat and how it effects you!
I like SheaPet (?) and Buddy Wash and PetSilk (personally)...but I have tried several shampoo's that I just didn't like....then gave them away or resold them here.
You can check out the grooming section
HERE for more tips, ideas too!