The Dayrooms at BKK are great. While I will be taking advantage of all this advice for a 20 hour layover later this month, last month I connected through the airport with only 7 hours. The Dayrooms run about $10 an hour and are clean, quiet and comfortable. I figured with all the time it would take to clear customs and then re-enter the airport upon my return, I could instead save lots of time in a Dayroom.

I haven't had a problem getting one yet (I've stayed in them twice), but both times the desk agent recommended that I get a reservation next time.