Long haul flight is very tiring, and it doesn't get any better with long transit at the airport. Somehow, transiting at the HKIA was a good experience, mainly because it has so many duty free shops that make you itchy. Can you believe that they even have a Zara store inside the airport hall? The food court is also big, and it's expanding.
We figured that an airport this big should also have a shower lounge. Lo and behold, they have about 4 of them all opened 24 hours, called Traveler's Lounge and Plaza Premium Lounge, located at Terminal 1 before Gate 1, after Gate 35, after Gate 60, and connecting Terminal 1 and 2. Other than shower, they offered a private resting area, a business center, massage, and even hairstyling.
The shower costs HK$150 per person, which is about $20. Here's a peak of the individual shower room.