Ive heard other similar stories like this about the same dentist. I would steer clear personally. Thank you guys for being honest and giving your experience and warning others. Though I know the charges are cheaper in Mexico, consider this:
It must be noted that Mexican dentists do not obtain the required medical and dental training of the average United States dentist. If something goes wrong you cannot sue a Mexican dentist. Finally, Mexican dentists do not practice the standard of care of their United States counter parts.
Dentistry is a medical specialty like any other. Think twice before you cross the border looking for a cheap deal