Welcome to the forums!! I don't have any experience with this breeder...I'm in Canada. Just took a look at their website. They seem to show their dogs and do the required health testing on their breeding dogs. What are your plans with your dog? Are you interested in titles, sport, companion,etc.?? What experience do you have with the breed?? It looks like this breeder is more of a commercial breeder. Where are the puppies whelped? and where are they raised? Do the dogs live in kennels?
The breeder has three breedings planned, all pups coming this Spring. Unless they have help...very hard to raise well balanced pups with so many due at the same time. The breeder also used the same male (his own male) on all three expected litters. Most commercial breeders use their in house male for stud...but that does not mean that they always complement every female for breeding.
I prefer to get a well raised puppy from a small hobby breeder...that only has a litter or two in a year.