I've been going to Dr. Singer since he took over my dentist's practice. He's excellent. Never wastes my time with 'supposed' teeth issues (I've had a spot on my tooth they've been watching for several years - other dentists would've jumped at hacking into it).
Just as important, I've never had a billing issue. Insurance is handled with nary a complaint or problem. It seems like all my friends who go to other dentists can't seem to get their bills straightened out.
I highly recommend these fine folks in Damascus, MD.