The car was very clean.
But there was one peculiar experience: when I picked it up, the staff member showed no interest in checking the existing scratches on the car. They basically handed me the keys, explained a few things, and walked away!
To protect myself, I spent a lot of time taking notes and asking him to keep the relevant records, which he did. Also, the electronic fuel gauge in the car was broken and didn't record the correct fuel level.
When I returned the car, the staff member promptly accepted it and there were no issues. Of course, if you encounter this situation in the future, I recommend that you handle it with caution!