Yes codes and coupons are wonderful and you should always try several codes to see which one gets the best price. However, remember to continue to check your reservation because SOMETIMES the rates will drop further as your trip gets closer. You will have to rebook and cancel your first reservation. My National rate for Feb. has dropped 3 times in the past week. I checked yesterday and it went higher than the first rate, so it's always up and down. Mostly if someone gets a good rate, they will post it on the boards here.