As far as I'm aware, they've always done things by the book, and more. Not many people will give you a replacement pup should anything be wrong with your original choice.
I've been there a few times, and david and sally always had time, patience and were friendly, knowledgeable about the dogs, and offered good advice about the pups. And the place was clean, the dogs were clean, and all the dogs were friendly and sociable. Something I can 100% assure you that you won't get with the majority of backyard breeders, most of whom won't have a clue.
People can only speak as they find ?