Originally Posted by esv1226
at the supermarket, the exchange rate are on notice boards which are no different (I believe) from money changers rates. at check out i can choose to pay in dollars or in pesos.
i see your point. sooner or later i need pesos to spend. but i have the benefit of changing dollars to pesos when exchange rates are favorable to me.
To me the SM rates seem on a par with the airport rates, only to be used if deparate.