I have been going to Dr. Bernsdorf for over 10 years. Most of the time, I have been satisfied with his work. Customer service is fairly good. However, I am not happy with a crown that was done recently. I noticed that it had a gap in it. I was experiencing a lot of sensitivity where the crown was for over a year after the work was done. I asked about redoing it and was told that it cannot be redone and that I should just use sensitivity toothpaste. I am concerned that food could get trapped in it and cause later problems. I am searching now to can get a second opinion on having it redone.