I had a great rental experience here. Enterprise seems consistently good in every city. I definitely prefer to use them and pay a little more than use some company that has bad customer service.
Getting the car was seamless. The cars available were in good shape. The agent let me pick from several options. They give you some bottled water when you arrive. The agent didn't push me to buy insurance (my credit card has primary insurance for rental car, plus I have my own insurance).
The return process was also quick and smooth. You pull up in the lane and the employee takes a look at the car for a minute and off you go.
Some other folks seem to have longer waits... maybe enterprise hired more employees or those customers just came at during a really busy time.
Overall, this experience at the PHX Enterprise was on par with all other Enterprises I've used across the country, which is consistently EXCELLENT. Highly recommended.