I have spent around 5 hours last time when I was at the Wing.
I arrrived at HKG @ 5:30am. Got to the lounge @ 6am (as they use the small one downstair before 6am).
Used the Cabana for around 2 hours (accidently fell asleep there)
Dine at the Haven for 1 hour
Served the net and finished my work for 1 hour
relax as the Library (reading chinese magazines for 1 hour)

Actually by that time i feel really bored and decided to go home and drop off some luggage before heading back to the lounge again for lunch (which was a good buffet) before our flight to YVR/JFK