Horrendous. Never again.
Rented two minivans through Avis with a Costco discount code I've used before (most recently two weeks prior in Dallas) and staff were rude and refused to accept that code. Doubled their price and when the vans were finally ready one had not been cleaned and the other had a large dent in it that we had to argue to have notated on paperwork. Never had such issues with Avis, but on reading reviews I see this is standard practice at this location.