At a glance, looks pretty good (very pretty dogs!) Definitely worth further investigation. Some questions I personally would ask (I would ask these of all breeders):
- Where do the dogs live? I count 17 dogs listed on the website, so I would want to know if they live in a kennel or in the home.
- Where are the pups raised? What socializing and exposure is done during their first 8 weeks? How long do they stay with the mother?
- How many litters do they have in an average year?
- What kind of health guarantee/ support do they offer once you have taken the pup home with you?
And on the health side, I would check that any dogs that are bred are listed here:
http://www.offa.org Don't take any breeder's word for it, always check for yourself that the full testing has been done and passed.