I have dentures... My dentist in the U.S. charged me $2200 for a set that I couldn't wear due to the pain and lacerations they caused. I fought with him for a year and finally gave up. Took him 3 weeks to make them.
Went across the border to Nogales to a dentist there. Took the impressions, I went for a coffee at the local cantina, returned an hour later, had the final fitting done and paid my bill. Best fitting dentures I've ever had, start to finish was about 4.5 hours and the cost was $500. She has my business from now on.
Mexico is no different than any place else...you'll find good ones and you'll find bad ones. I had a very poor one here and a winner in Mexico.