I was leery about using this agency based on Yelp reviews I had read. However, I know that they recently merged with E-Z Rent-A-Car, which I used several times in Las Vegas, so I was willing to give them a try. In fact, I made my reservation through the E-Z Rent-A-Car website.
The service I received at Advantage in Phoenix was nearly identical to the service I received at E-Z in Las Vegas. I was fortunate in that when I arrived at the rental car center, the building was nearly empty. No lines - ding!
The gentleman processing my rental was polite and friendly. I was given a choice of two cars for my Intermediate selection. I politely declined the typical add ons and options that rental car agencies usually offer and was on my way in a very short time. My car was a Mazda5, which ran well and had no problems during my rental period. Returning the car was extremely fast and easy.
I can only speak from my own experience, which was that I got a great price on my rental, received friendly prompt service and had no problems whatsoever. I would certainly recommend Advantage at PHX based on my rental. Thanks!