We were very happy with our Enterprise rental. I booked on the phone (old school, I know), picked up the car at the hotel, and returned it to the airport. There were no glitches anywhere along the way, and we paid the quoted price, not a penny more, which I appreciated -- no surprises.
There was a little bit of a wait for the car on Saturday morning -- about 15 minutes, nothing terrible. We got a free upgrade and there were no problems with the car.
The desk staff was friendly and helpful. I would definitely rent from Enterprise again.
Additional bonus - this is a smoke-free hotel, so you don't have to inhale secondhand smoke while you're waiting for the car.