I liked how easy it was to book.
Even though we had a confirmation number for our reservation that National Car rental branch we reserved it at didn't have it in their system and wouldn't honor our reservation. They first told us that had no cars for us. This was after we checkout of our hotel and had a taxi drop us off at the rental site expecting to get in our car. Later they told us they could get us a VW Passat but it was going to be 4x the price we booked so we said no thank you. It was very frustrating. When you receive a confirmation for a reservation you expect them to honor it. I will not be using this service again.