Haven't heard of that group, but my son (after a really bad head trauma) had difficulty with BPPV. Couldn't walk straight, was always off balance, etc. Since he was already at Wash. Hospital Center, we took him to see Dr. Fitzgerald. He helped my son to where he no longer has any issues with that. Here is his website:
I think that's Dr. Reel (sp?) near the Rt. 4/Rt. 5 intersection. I had a friend that went to him a while back. I don't remember the specifics, but she was not impressed and went to someone else.