It has been reported in this forum that ATMs in Rio's International Airport (GIG) should not be used due to various scams perpetrated there. I've seen no such reports for Sao Paulo (GRU), so is it safe to assume that ATMs there are OK to use?
I've also seen reports here about Brazilian ATMs not accepting foreign ATM cards - how widespread is this problem? Are some banks' ATMs better than others in this regard?
Finally, should I need to exchange cash (USD) in Rio, what are the best places to go to?
Thanks in advance.