Originally Posted by
zebrametalevel
I've done this three or four times flying BKK to LHR, with very slightly different times.
Airport hotel is excellent, quiet and comfortable. It only takes one time of seeing the people who didn't book in advance sat with red eyes, crying infants, and a general air of dejection, despair, and despondency to convince you never to join that category...
Last time I checked in at the Airport hotel it was a crowd trying to get a room, even security that only let people with reservations approach the check-in desk. Advance booking seems to be important.