I have one of their Working Showline puppies and I will say the dog is amazing. I've also seen and interacted with several of the working line puppies they had when I would visit and all of them have been very social dogs as are the sires and dams they have on site.
Because they are only 25 miles away from where I live I was able to visit my puppy on a weekly basis and also interact with him for 5+ weeks before I brought him home. I know that I could have purchased a puppy for less money but I liked the fact that there is that 5 year health and temperament guarantee.
I know that there are many good breeders out there but I wanted to give you some input from someone who own's one of their puppies.