Originally Posted by atn
Don't, and I remark this, don't change money at Global Exchange in the airport, they will offer you a rate that is miserable. Try to find the Banco Nacion, also at the airport (it is hidden behind the Global Exchange, by a newspaper stand) and they will offer you a much better rate (i.e 2.5 $ for a dolar in Global Exchange vs 2.85 at Banco Nacion).
Good luck and don't worry about the 25/5
Javier
Absolutely correct, stay away from Global Exchange - they take you to the cleaners.