In my recent experience (nothing within the last few weeks though): USAA pretty top notch for midweek dailies when the prices are otherwise ridiculous. On weekends/weeklies, though, AAA and USAA are often the same, or sometimes AAA is less. Travel Partner still works better for some things. And even with these generalizations, it can vary by class. Example with the midweek dailies (2-3 day rentals): for B or C, I think Travel Partner was better, but for F USAA was better. All this stuff can vary by station as well. Most of my rentals are from right here at PIT.

I used to try Costco, Entertainment, Citi, Chase, etc. at times, but these at best equal the other three. Never had one of those actually beat the others that I can recall. I haven't been testing Ameniti too much, although it doesn't seem to do much for smaller classes.

No CDP appears to ever be the 100% guaranteed all the time lowest rate even from the same location.