I know this is too late to be useful for olddaddy, and is outdated information, but I used to stay at Furama Silom. However, on my last visit a few years ago I got a low level room and it was in need of a re-do. It was looking very tired and in need of some work. Even more than me. I'd also never had a room that low in the building. I went elsewhere after that.
Always found the breakfast was a wide selection buffet, regularly re-stocked, and with the 'egg station' for your freshly fried / scrambled / omelette eggs