Maybe its just us, but we have had really bad luck using the Dolphin. Last December, we needed to swap out a car when a electrical problem meant that the passenger door would not unlock. The whole process took about 45 minutes and we were downgraded from a premium to a full size as there were no premium cars available (not sure why the person we talked to on the phone before heading to the Dolphin said there were!).
On our recent trip, it looked better when we were picking up at about 2 pm on a Sat. No line, quick service, nice car. But when we got to the valet stand, it was mobbed with a group from a business meeting that had just broken up, so we still ended up waiting about 30 minutes for the car.
On the return on a Monday morning, we were fifth in line and there was a delay due to a broken printer (it was literally lying upside down on the floor behnd the counter -- RIP!). At one point the single employee helping cutomers asked everyone in line except me (maybe becuase I was the only women???) if they were picking up or returning and took the return first. Since I wasn't asked, I waited my turn and was finally finished about 50 minutes after we dropped the car with the valet.
We stay at BWV, so the Dolphin is a very convenient location, but we were talking about not renting a car at all on the next trip. We are fine with Disney transportiation to the Parks and ME, so we only use the car for DD and grocery/outlet mall shopping. I think 3 or 4 RT taxi rides would be cheaper and more convenient than renting. -- Suzanne