Of all the airlines I've flown with in recent years, Singapore are probably the best, all things considered. I'd agree with Businesstravellers comments, above, and also add that I was impressed with the cabin crew.
I flew LHR – SIN – DPS and back with them a few years ago, and all flights operated on time. No problems with luggage, in fact my bags made it into the connecting flight to DPS outbound despite a tight connection and the connecting flight departing from a different terminal.
If you fly on the A380, I'd recommend the upper deck.
Changhi is also a first class airport, and transferring between flights is pretty painless.
Good luck.
Last edited by Andy_S; 4th September 2012 at 11:19.