When I asked questions during the rental, they didn't provide explanations.

I rented a Ford Explorer, but it wasn't available. They gave me a Hyundai Santa Fe instead, but I found out that the trunk couldn't fit all the luggage. They later coordinated a Ford FLEX for me. I've always rented cars of the same type.

Quite good

Big company, the vehicle was in great condition, over 20,000 miles, and no issues throughout the journey.

The wait for pick-up was far too long, especially after a long flight. At first there was only one person at the desk for a long line of people. The key to the car was manual (i.e., without a clicker to lock it), which was somewhat inconvenient. At the drop-off at SFO, my wife fell, and the Budget attendants where extremely caring and helpful, and insisted that they drive us to the terminal.