We started to go to Dr Roger Hammel who was a good doctor and we thought Dr Choi is a good dentist too. Finaly we found out that his work has issues and at one point he tried to hide his mistake. We also experienced for root canal treatment at the office which he recommended. It was EXTREMELY painful and it was decided to be stopped and referred to other dentist because the dentist could not finish the root canal. To make things worse they asked me to sign the paperwork in the middle of painful treatment. Finally we decided to move to other dentist. Very rude, unprofessional and not recommended.