He might be an ok dentist. But he has a lot of patients, For that reason, he doesn't have time to look at you. I go and see him every 6 months; he spares only 5 min, on the other times the hygienist does everything. For that reason once I changed my dentist he discovered a lot of new issues.
Another reason to leave that dentist was, already he knew that I am part of Premera Blue Cross network, he (and he did the same thing for my girlfriend) referred me to an Endodontist who is out of network (too bad that I didn't confirmed, I blindly believed him) for my root canal, but the Endodontist was like a money oriented guy who is trying to maximize his profit and do whatever it takes: pressures you, find some fake issues,.. and it was my worse Endodontist experience ever. (Endodontists name was Karim Z Alibhai)