SQ on the 380 and 777 have a flat bed, but when it's upright for sitting, I find it too wide to get comfortable - sounds weird I know but some friends and I were talking about this the other day and we all agree that it is fine for sleeping but not quite right when trying to eat.
Otherwise, the service is excellent, the IFE is pretty OK and the F&B usually good so I am happy to keep with SQ when it is an option.