I've used Excelsior twice in the past and I'm very happy. I thought they were a tad steep but for about $700 in summer 2006, I got a two piece woollen suit, seven all cotton shirts, and five pairs of pants. The work was excellent, the shirts are holding up very well, and everyone loves the suit.
For what it's worth, I wanted a dark pinstriped suit, and they had lots of material to offer. B
115/1 Siamheritage opposite the Le Meridien. I guess they are the first tailor shop on the area and its always best to get suits at business districts.