Dr Estwani is the best dentist in Herndon/Reston area. He is an expert and he is the best at what he is doing and the best part is its painless. The only problem is with the front desk lady. She is rude at times, and she does not stick to her word regarding your billing(Caution!!). I would rate 5* for this dentist however i was pretty disappointed with the frontdesk lady...