I currently have a National reservation for 12/3-12/7 (returning at 7pm, so 12/7 is counted as a full day). The total is $194, using the KLM Royal Dutch Airlines code. I hope to add in a National coupon for a free day or discount when they are valid for my dates.
I booked my ressie back in June, and today I found something I've never seen before. I put in the same dates with a different code to check rates and it told me there were no vehicles available in that location. I really hope this is a glitch and not an indication that they are completely booked up!