SMS,
The SIN-BKK-SIN leg is the sector I frequent. This is a good BC service for me between the 2 cities, but mainly because it is cheap. It does not compare by a long shot to what else is offered to CPH. TG and SQ will serve you much better in BC. Bigger seats on 747's, better service, better food, much better entertainement then those funny SK vcr's etc. They are both star members, so that is no reason to avoid them.