I made a car reservation about a month ago for a National minivan for January 4-15, 2010.(11 nights) I got a total rate of $478.00. When I check all the rental companies (including National) the prices are more than double that...some more than triple that. I am pleased with the price I got, but is it possible something is wrong, and they will not honor that price when we get there? Also, I made this reservation without using any code at all, as there are no codes yet for my dates. When they release codes, can I apply them to this reservation, and make the cost even less??