I think PennHip is a great idea. One of the vet's I use, graduated from UPENN, and is certified for PennHip. The problem I have found is, people who breed to our dogs want OFA grading. Sheltie world has not transitioned over to PennHip being accepted INSTEAD of OFA. So, I could either do both, or just do OFA.
I know it will change, it just makes sense, but we're dragging the breeders along kicking and screaming.