I rented a minivan for a week in August from National at the Burbank/Bob Hope Airport. I used National because of a discount and points offer from a credit card and got my moneys worth--a reliable ride that allowed me to carry up to 7 people and with self storing seats that allowed me to haul a load of folding tables and chairs to an event dinner.
Pick-up and drop off are done at a multilevel garage on-site at the airport--no shuttles to off-site locations, though a bit of a walk on an elevated pedestrian walkway from the terminal to the rental car center. I checked in with my reservation at the desk and made payment arrangements, then was able to go to the garage and select the minivan of my choice (4 to pick from at the time). I chose to get the loss damage waiver for 14.99/day, which ended up saving me the cost of my own insurance's deductible. Someone scratched the side of the van with their side view mirror in the hotel parking garage and didn't leave a note. On returning the car, it was just a simple drop off and check that the gas tank was full, got the receipt and good to go.
The staff at National's rental desk and at pick-up were friendly and professional, very efficient in getting me into a car and a quick and easy return. It was an excellent car rental experience