First time patients watch out! I question Thomas R. O'Brien's ethics. His office was walking distance from my apartment so I thought I would give him a chance. The staff was great. The cleaning went well. Then Dr. O'Brien stepped up to the plate. He said I had a mouth full of cavities. First clue that raised a red flag he said I had a cavity on a fake tooth. I kept a poker face. Then he said I had 3 other cavities towards the back. I had to get a second opinion. So, I drove back to Katy to the Doctor I had been seeing for 10 years. My doctor laughed and said those are stains in the back. No cavities!!!!!! Thomas R. O'Brien is a sports freak that only cares about his professional athletes patients. Those of us who do not have stacks of cash he will try and go for broke and get whatever he can anyways. The experience was sad and pathetic. It all screamed hubris and narcissism.