Just a complete side to the OT, but worth stating.
From a 6-year veteran of the car rental agencies, they will try to upsell you from the car you have reserved.
Tip 1: NEVER accept that until they tell you what they have to offer. Quite often, at least with the major agencies, they oversell the smaller cars, and will have to give you the larger car for no extra charge. Always wait.
Tip 2: Check with your insurance company and/or credit card and make sure your covered for damages. You can save yourself a lot of cash by declining their insurance coverage.
Eric the Grey