That is interesting - when we were there last month we used bank machines in playa el agua, as well as in sambil mall. had no problem at all!
I was there last year. There were a couple of ATMs that took Interac but they were hard to find. They were no ATMs that take Plus. These were the 2 for my CIBC bank account. People who had no problems who had cards that were Cirrus or Maestro. Look on the back of your card. Those people could even withdraw from tiny credit union accounts. I am opening a Bank of Montreal account this year so that I will be able to get cash if needed.
Ya our cards were canada trust and royal bank. No problems there.
This is one destination you can leave home to go to without your credit card. Why settle for the official rate of 15%less? After reading this board, there's not a whole lot of wisdom on MI here.
The previous postings have been about ATMs, not necessarily credit cards. Last time I took enough cash with me (and got far better exchange rate as everyone knows) and never needed an ATM. But if I had needed cash I would have had trouble finding someplace to get it. Emergencies can arise. It is always better to be prepared.