WHATEVER YOU DO, DON'T RENT A CAR AT SKY HARBOR AIRPORT IN PHOENIX, ARIZONA!!
I rented from Thrifty and asked for an upgrade from the econ model I originally reserved. I have never been charged for an upgrade like I did this time. My original weekly quote was 176..00. Thrifty ended up charging me 400.00! for a single upgrade. I should have just driven my own car! There was nearly 100.00 in charges just from renting from Sky Harbor Airport in Phoenix. Concession fees, taxes on fees, blah blah blah. I didn't even get the insurance! Then to top it off, they held 550.00 as a deposit for 7 days while I traveled in Mexico with very little cash. I am so mad!
Don't rent a car at Thrifty/Dollar at the airport here. You will get screwed.
Never again will I rent from this company.