I've only had older TG planes and found it a bit cramped (6'1", solid build) - though better than Air China, shoulders jammed going through the galley section.

QF flight in Y on A380 SIN-SYD last week and it seemed modern and with leg room, it felt very claustrophobic when the seat in front was reclined. (747 QF flights in the other direction felt very old and worn out)

SQ and EK have been my favourites for Y (I've never used Asiana or Korean)