PHX suffers from tremendous variations in demand for cars, so the upgrades are not consistent. The off-site facility is the nicest of any off-site I have ever used, and the staff are good. In my experience, these are the plusses and minuses that create the inconsistency in car availability.
Negatives:
- PHX is a glorious destination, so lots of folks visit singly, including people who have status and may arrive before you.
- PHX is a conferene destination, ditto.
- PHX is an event destination, ditto to the extreme as the high rollers show up for the golf event / car event / horse event, etc.
Summary: At certain high-demand periods, the PHX Hertz lot is nearly emptied by one or more of the above crowds being in PHX before you arrive.
Positives:
- PHX has a lot of very fine, very new vehicles to cater to the groups mentioned above.
- PHX in the summer is as hot as the hinges of hell, so there are specific times when the crowds have not descended on the lot before you arrive.
Summary: If you happen to arrive when the groups above are not in town, your upgrades can be outstanding cars.