The originally booked car was unavailable, so they offered a free upgrade.

No Chinese service.

Thai company is a local car rental company in Thailand. I chose them initially for their competitive prices and because they are local, which I thought would be helpful in case any issues arose. It turns out the process of picking up and returning the car was quite smooth and less complicated than I imagined. They didn't inspect too much during the return, just checked the fuel gauge, which was nice and easygoing.

For Malaysians driving here, it's not bad. The car is a bit worn out, but everything else is okay.

Car rental was really quick, swipe the deposit, sign a few names, provide a phone number, then you get the car outside ---- the parking lot is just outside the door, note the scratches when picking up the car, inform them of full fuel on return, sign another name and drive away. Return was also very quick. Overall, a very good experience.