My kids go to Shah's and I've had no problems. Dr. Shah (Ila) in Charlotte Hall isn't the most personable person in the world, but I've never had any problems. I've always been able to call and get a same day appt, or a prescription called in, or whatever else I need. Linda and Michelle (the receptionists) are great.
Also, hubby and I started going to Dr. Bauer (the daughter) and they are also part of Shah Associates. I haven't had to see her yet (we just switched to them a few months ago) but hubby liked her.