Stayed in Phoenix for a couple of days and chose these guys for my rental. It turned out to be a really good decision.
The pros:
1. The airport has a convenient shuttle to take you to the car rental center. The rental counter was easy to find, the staff was friendly, and very quick to get me set up with a car.
2. Very friendly and helpful garage staff. It turned out that they didn't have the car I reserved so I got a free upgrade. This ended up being a convertible Mustang. Oh the horror. I had to drive a convertible Mustang in beautiful Arizona weather. Thanks for the upgrade.
3. Easy to find when I needed to return my car. Easy checkout, and simple to get back the shuttle pickup.
4. The prices are good but it seems that the state of Arizona has found a nice cash-cow by gouging travelers with taxes. They pretty much double the overall rental price. This doesn't seem to be a Dollar thing, it was evident in all of the rental companies when I searched for cars.
The cons:
1. Just the overall fees that doubled the price of the car is my only concern.