Beware of changing your money in Prague! I went into what I thought was a western union and got totally screwed out of almost 100 usd! I went there because of the western union name but now i dont even think it was one. Changing money is apparently totally unregulated so they bend you over if you give them a Chance to do so, I suggest just using your ATM card if you need money. I've changed money before all over the world and have never had a problem. Well, I learned a hundred dollar lesson today. No wonder there are so many change houses all over this city.