Ok

Overall quite good. The store at Madrid Airport in T4 is easy to find. If you land in T4S, be sure to take the shuttle to T4 to find the store. I wandered around T4S for a while... When returning the car, make sure to go slowly. If you drive too fast and miss the entrance, you'll end up at the parking lot's toll booth. Once you're there, you can't go back and will need to take another lap around. The actual car return entrance is a small, inconspicuous opening on the right before the toll booth.

The rental store will try to make you change cars and pay for more expensive insurance. If you refuse, they will tell you that the car you want is no longer available, and the only car left requires an extra fee. The location for car exchange is not accurate and hard to find.

Unreasonable charges

Friendly, English-speaking staff at the Vigo downtown location. Fast pickup, good road trip.

Fairly long wait for pick up. Was told when booking online I had paid in full and would pay nothing at pick up. When picking the car up I was required to pay an additional 23€ tax and an 800€ deposit.