The first time I was alone, it was quick. The second time, there were no cars available and I waited for half an hour. By the time my turn came, there were two people ahead of me, and I waited another 20 minutes. It felt somewhat inefficient, but overall acceptable since language barriers need time.

Car return at terminal 3 and 4, the key drop off inside the building, a little bit hard to find, no sign board show where is the key drop off point. I asked around.

Good

So far so good

So far so good

Like: Free upgrade at no charge