Agreed....this new Avis website is terrible. You cannot back up and change your car type without having to rekey the page and it is DEAD FREAKING SLOW!
Avis customer service, in general, is taking a trip into the toilet. I had to fight at IND last week for my Pref Sel upgrade from a 4 door compact to a mid size. The return process took 30 minutes since the agent didn't check out my car properly. DFW return agents are rude.
All in all, I just noticed that I have sent the last 4 weeks of my travel to Hertz. For about $5 more a day I at least get a half-decent experience.