I'm in the same area and still debating. do you expect phx to have more rocks flying around than other parts of the country?
what do you think of dust storms?
Honestly, an nice advantage of a full PPF installation is that if you are in an area with a ton of dust and you park your car for even 10 min, you get this slight dust layer. Drives me nuts after I just finished washing the car. With PPF, I just use a california duster when it has light dust and any slight swirls self heads in the sun. I LOVE my ppf.