Dr. H is excellent and put me at ease. I was in a lot of pain before seeing him (and after treatment by another dentist) and after being treated by him, I've been pain free (and very happy).
He was written up in the Washingtonian magazine as one of the best endodontists in the DC and came highly recommended by my dad. I think you owe it to yourself to get the best possible treatment available by going to Dr. Herbst.