San Francisco, Los Angeles, Las Vegas, Grand Canyon, Antelope Canyon, Arches National Park, Salt Lak

They just charge random fees.

I had prepaid the full amount and arrived at the store at around 12:30 am, only to be told there were no cars available in the reserved category. They insisted I pay an additional $100 per day to upgrade, or else I could only get a 12-seater van. Unacceptable! I tried contacting the rental company, but their phone line was always busy. Online customer service said the rental company needed to provide proof of no available cars, which the AVIS staff refused to issue. They kept trying to convince me to pay the $100 upgrade. After much argument and a dying phone battery, I left the counter to charge my phone at a nearby table. Only then did the staff call me back, saying they had a returned car available. It took an hour of wrangling to finally get the car at 1 am. Shame on AVIS!

There were many people, waited in line for 1.5 hours to get processed

When I picked up the car, I had a lot of luggage. The counter staff suggested I switch to a bigger car. I thought the car he recommended was too expensive, so I declined. Then he took me to see a Kia SUV and said it was only $50 a day. Since the price was similar to my original booking, I agreed. But I was shocked to see the final bill was over $800 for 8 days. This is outright deception! It's partly my fault for trusting him because he seemed very enthusiastic, and I didn't scrutinize the documents after repeatedly confirming it was $50 a day. It seems shameless people exist everywhere. I've learned my lesson.

Returned at the Avis LAX location. It has poor reviews on Yelp, but when I went there, it was not crowded and quite okay.