This was a fantastic experience, and I gained some valuable experience myself. As someone who isn't fluent in English, it was easy to find the rental car location at the airport by simply looking for the icon of 'a car with a key on top.' Credit cards with the UnionPay logo were also accepted (I noticed on this trip that UnionPay cards are no longer widely accepted in many places in the U.S., so I recommend switching to a chip-enabled foreign currency card before your trip). The counter staff asked if I wanted insurance. I had already purchased full coverage on the app, but for convenience, I added toll fee waivers and the option to return the car without a full tank. Including the $200 deposit, the final bill came to over $1,270 (the app indicated it would be $860 paid at the counter). Looking back, if you do thorough travel research, there's no need to spend extra money on these options. Picking up the car was very straightforward—just find the parking spot with the rental company logo, and you can drive off. A minor hiccup occurred when there was no car at the designated spot initially, but the parking lot staff were excellent. They quickly arranged another vehicle of the same category. The car was brand new, though there was a small scratch on the rear bumper. They assured me it was already marked. And with that, my vacation began smoothly.

Good service. At Miami Airport AVIS rental counter, there was only one person ahead of me. No waiting in line, and the paperwork was done in 10 minutes. Other companies had long queues, likely taking over an hour to complete.

Very good

Apart from trying to sell extras (insurance and toll road readers) everything went alright.

Like: Rented a mini van and then upgraded to a full size Ford Expedition - all was perfect
Dislike: I was in the middle of Hurricane Irma, and I could not add additional insurance to cover the car over the phone and all the locations around me were closed. I called the Avis for help and then told me to go to 2 locations which were were closed.