It was okay

Unauthorized charges, waiting for customer service response.

There were quite a few people in line, and with only a few counters, I waited for more than half an hour. However, the crowd indicates that AVIS is quite popular.

I'm not satisfied, I had no intention to upgrade.

The cars from Avis in San Francisco are not very new. When I went to pick up the car, they informed me that the reserved model was not available and gave me a very old Ford instead, claiming it was the only similar model available. If I wanted to change cars, I had to pay extra. I saw many similar models at the pickup point, but after checking and returning to the counter, they still insisted it wasn't the same type and that I had to pay extra. The attendant was Chinese and tried to overcharge me just the same. I thought a big company like Avis wouldn’t have such issues. Finally, after arguing with the manager, they gave me another car, which they claimed was an upgraded Ford Explorer.