Pretty good overall. We handled everything right inside Bangkok Suvarnabhumi Airport, just a few steps after coming out, then picked up the car outside. Returning the car was super quick too.

The service attitude is excellent and very considerate.

We arrived closed to midnight and we have to wait for at least 15 to 20 mins before the staff turned up and when finalized with the booking, almost closed to 0030 the Christmas Eve. Other than slow pick up of the car, others seen alright. The drop off was quick and easy, as it save me lots of time for my flight check in.

Like: Easy pick up and drop-off. Right at the terminal door.
Dislike: Car was a bit old with lots of small damage. Mechanically sound but not the best condition.