The one in Ploenchit has two wings, the normal wing has the smallest room for a four star hotel. The newer wing with club room you need to walk for miles, although the room is bigger. The decoration is not inspiring but rather pile. The restaurant used to be a market type thing when I used to go there, and I much prefer the set up of the Silom after they have done the refurbishment. More importantly Silom one has bathtubs where the ploenchit and Asoke one does not have! Even better in the wing with Club room Silom HI has separate showers and bathtubs!