On a 15 hour layover enroute to Phuket my friend and I stayed here to be close to the sights. We were warmly welcomed upon our midnight arrival and given advice on where to find the nightlife and nearby conveniences. The hotel is sufficient for an overnight stay and the restaurant adjacent to the lobby is open 24 hours.
It's not fancy by any means, but for the experienced traveler (such as myself) you can expect decent accommodations. Don't stay looking for a 4 star hotel. The rooms are no frills, the beds are like most in Thailand...hard...and the Grand Palace and Wat Pho are a ten minute walk.