I had to have a root canal while in the DR. Dr. Reyes specializes in this area. Equipment was modern. The area was nice and clean, and Dr. Reyes was very detailed and speaks English. I was out about 13100 pesos for the drill work (no reconstruction) on a lower molar.
The the only downside was having a root canal. And finding the place. Just have to look for the little for plaque on your left.