The experience I had at Drivetime was awesome. I talked to Joe on the phone with lots of questions, and he didn't hesistate to answer any of them. He booked me an appointment the following day. When I arrived I was greeted by Glenn who took care of us so that we wouldn't need to wait. We looked at only the cars I wanted to look at and he never pressured me into getting anything else.
I ended up getting a beautiful 2012 Dodge Avenger, it was literally an in and out process. They really work with you when it comes to a down payment (you have 60 days to come in and put more towards a down payment to lower your monthly bill).
Joe had told me that they do not work off commission, so you really have no pressure to buy anything then and there. They keep your possible loan open for 40 days, so you have time to think. Also, if you refer anyone to buy a car from them you get credit towards your loan.
It was overall the best experience at a car dealership I've ever had!