You get an average rate, the rate of the day. Also, you get charged, once by the bank machine for the states, and once from your bank. We were getting charged up to $6 at some machines, after exchange. It depends where you go, and how often you are planning on withdrawing cash. We thought we would get a bit exchanged in Canada before leaving, and taking out money as we went. Dumb idea. Should have gotten travelers chq's before going. Never will I ever take money out of a machine again unless I am absolutely desperate down there.
Joline