I have heard it can be dangerous outside the hotel in some places there.
We walked a few blocks to the huge mall last night around 7pm.
It was cold and dark, but nobody followed us or mugged us.
They don't get the crowds of street kids down here like in Rio.
I was told not to carry a camera or laptop in public or in a cab though as a motorcycle with two riders will stop the cab at gunpoint and take anything valuable if they know you have it.