I was referred to Dr. Calvert by a co-worker, thus I decided to give it a try. The root canal turned out to be very tricky as the roots weren't straight, and turned 90 degrees at certain points. Dr. Calvert spot these and was very careful throughout the whole procedure. He didn't mind spending more time on my tooth to get it right. The 2 appointments were about 5 hrs in total for my molar. But after the procedure, my tooth wasn't hurting at all that I didn't need any pain killer! Now it's been a year since my procedure, and I haven't had any problems with that tooth. I'm very satisfied with him, and was very thankful that he made the supposedly "painful" root canal procedure pleasant. He is the best doctor I have met so far.