Joli's History and Experience
Looks like they don't have anything on the specific dogs in their breeding program, but it looks like they're breeding American Show line dogs, and they test at least for hips and elbows (if looking into them further, I'd ask about CERF testing, and whether they track their lines for DM, Mega Esophagus, and other GSD related issues).
Are you specifically looking into show lines, or did you happen to just find a show line breeder in your search? Probably one of the biggest factors of whether you get the dog that's really best for you is doing a little research into the different lines. You can get a list of breeders together that are all producing good dogs, but it's comparing apples and oranges if you're looking at different "types". When I was looking for what would be best for my family (we're currently waiting for a puppy!) I both looked at descriptions of what the different lines were like (like this article: (Types of German Shepherds, by Wildhaus Kennels )
) and I looked at TONS of breeder websites, just for the education of it. Even if the breeders were ones that I knew I'd never go to because of distance, I looked at them anyway. I used every one as a learning experience, looking at the dogs, looking at the health testing, how the pups are raised, how many litters in a year, etc. It helps you really get to know the differences in lines, and then once you settle on a type, it helps you whittle down what you feel would be a good breeder for you to work with.
If nothing else, that article about the different types should help you decide where to start!
Think of your goals and hopes for your new dog, and go from there. Good luck!!