I don't read a lot of ecstatic opinions of Avis. I'm generally happy. I always get the car I rented. Only 1 out the last 30 rentals priced wrong but that was easily fixed when I returned it. For preferred select renters, there are few benefits and they materialize sporadicaly. There have been customer service horror stories reported here. IMO, most are location-specific. You might tell us whee you are renting.

The premium cars I have rented have been Buick LeSabres. They have the usual equipment as well as an XM radio. Luxury has usually been a Cadillac Sedan DeVille, or sometimes a Lincoln Town Car. I prefer the Caddy for the XM (radio is important to me).

I'd rent from any of the majors if it saved me $100. I think the chances of a major snafu are low. But if you have one, the concensus seems to be that you will wish you hadn't rented from Avis. Of course, I don't haunt the other car rental forums. It's possible they have their share of customer disservice stories as well.