No upselling, but the car given was too small. I booked a Renault but got a Kia hybrid, not sure what model. With 5 people and 5 suitcases, it couldn't fit anything else. Considered getting a bigger car, but the price doubled, so I decided against it. Spain really requires small cars; navigating old town streets and even regular parking lots is a test of driving skills and judgment. Another issue was that the trunk couldn't lock, not sure why. Remember to send the address when picking up the car; just head to the car rental parking lot. There was a traffic ticket and toll fee from Portugal; not sure how much of the deposit will be refunded.

Use the machine to get a number first. They don't push too many add-ons. Just say you've already purchased everything, and they won't push further. Also, don't switch car models, it will change the price.

Returned the car at night using self-service. Left the keys in the mailbox at the store entrance, and the return was confirmed early the next morning with the credit card preauthorization canceled. A fantastic experience!

Acceptable

Booked a VW Polo, received Citroen C3 with 30k kms on it. Nice, surprisingly spacious, economical. We were very happy with the rental. Budget/Avis did not nitpick at every little scratch that was not listed on the car damages sheet - at pickup there was nobody present, and we were asked to take pictures of any scratches we find that are not marked (we found a few) - and keep the pictures until return, on return they only glanced at the vehicle, said everything is ok and that was it.