I've always used Alamo; they are reliable.

Large companies are more reliable. Demand was high, so I had to wait half an hour before getting a car.

The Alamo company is quite good. There are plenty of vehicle options, and they are relatively new. The Jeep I rented had only driven a bit over 2000 kilometers. There were no additional charges or upselling. Just take your printed rental confirmation and proceed directly to complete the paperwork. The printed contract is the same as the rental confirmation.

I picked up the car in San Francisco and returned it in Las Vegas. Although my English is poor, the rental company provided excellent service. The process of picking up and returning the car was fast and convenient. Very good experience.