The queue was too slow.

Various scams. An Indian guy said I had to buy the insurance and refused to listen when I said no. He even refused to take a call from our Chinese coordinator! Eventually, he left the counter and hid. A woman came over to tell us our car was too small and suggested we upgrade to a bigger one. I said no, we need to resolve this issue. She replied, if you want to resolve it, find the guy from before because it's not my problem!

Short waiting time in line, but the shuttle bus was rather slow.

The return process was very rough, and I was overcharged. There was a quarter tank of gas left, but they charged me for a full tank. They pre-charged for the tolls, then didn't check at the return and just took the full amount, over 100 dollars. I had to go to the counter to cancel it.

Limited car models. Originally booked a Grand Cherokee, but there was none available upon arrival. Had to upgrade the car and spent over 1000 extra. Staff service was excellent, quick car exchange was quite convenient. Everything was great except for the forced upgrade.