For $160, we nabbed a standard room at the BKK Novotel and checked in at 9pm. If this was a normal hotel check-in/check-out, we would have had to hit the road again around noon the next day. Instead, with the Novotel's 24-hour room, we used the entire time to sleep through a fever, checking out at 9pm the next day to catch a long-haul flight in far better health.
So what we're saying is...when you check out a hotel's website, look for something like this (as posted on the Novotel's main page): "Novotel Bangkok Suvarnabhumi Airport is 24-Hour Flexi - with no set check in time, arrive when it suits you and checkout 24 hours later." Now that we've experienced a 24-hour room, the regular check-in/check-out seems like a bit of a rip-off, especially if you're at a property that commands over $500 for a (short) night. Are 24-hour rooms the future? We'd like to think so, but they definitely require a large property for the flexible hours to flow.