I found the two for one deal on the AE to be excellent value. That with a taxi from Kowloon Station was just perfect after 14 hrs from YVR after far too much nice wine and great views of the Aleutians and a long line of thunderstorms over the NW Pacific.....
The 2 for 1 is, of course, only useful if you are travelling as a pair - or can find a friend at short notice.