I highly recommend Dr. Sim. Unfortunately, I have had to see him more often than I would like due to bad dental genes that run in my family. I love Dr. Sim's demeanor despite my aggravating dental issues. He is realistic and sympathetic. He is very thorough with explaining pros and cons even though it may mean that a procedure could prove to be unsuccessful. He has a wonderful manner about him and tries to calm the patient as he is very sensitive to a patient's anxieties. His office staff is fantastic as well, particularly Renita who is a ray of sunshine. I likely would have given treatment success four-stars had it not been for my bad gums despite the most aggressive of preventative measures! If you have to see an endodontist, Dr. Sim is the guy to see.