I've actually become sorta of an AVIS fan boy as of lately.

They're prices as with a previous poster tend to be higher, but it's well worth it. Since my first rental as a Preferred, I was upgrades and there's only been one rental they haven't upgraded me, but they looked and given me the model I wanted from what they had without even thinking about it.

It's fairly simple, if you're eligible for the Select and Go, just go to a car parked in that row and show up at the gate with your license and card and that's it.

You can also upgrade, and 40% of the time, being nice to the agent booth got me the upgrade at the same rate. (Last example, being a Full Size, and getting a Camaro SS for free).

If you show up at the window nicely they really like helping people (and I've rented at 9 locations now). I went and told them I wanted to enjoy my drive and if they had something better, and they switched me from a Optima to a MKZ without even hesitating, and a couple of months back gave me a Explorer Limited on a way from FLL to JFK on a Full Size rental. Even got a Brand new Caddy XTS4 at JFK when the attendant saw me kinda hesitating the free upgrade they gave me to a Edge, so he gave me a XTS4 with 18 miles on the clock.

I really love them, I rather pay the higher price but get better quality.