I had a great experience renting with Enterprise in Phoenix. I approached the rental with no little trepidation given:
1. Phoenix's reputation for high car rental surcharges
2. Enterprise's low prices
My concerns were groundless. Our daily rental rate for a sleek 2012 Mazda 6 that handled like a dream was ~$35/day after all taxes, fees and facility surcharges. We paid $8 for the upgrade (from an economy car), and it was completely worth it
We had absolutely no issues with pick-up or drop-off and the entire staff was courteous, professional and helpful. They even gave us water bottles for the road!
PARTING THOUGHT: Be sure to take advantage of the free loyalty program, Enterprise Plus. With the special priority line, we breezed through to the counter (even though there were 8 or so people waiting in the regular line)! They also send you coupons for free upgrades, etc.