I went to HKG as well in late July and visited several of the F lounges at the airport for comparison. I had done some research beforehand on FT and had seen the positive reviews for the Thai F lounge in HKG. I was anticipating it quite a bit.
I stopped at the SQ lounge first as it is closest to security/immigration. Meh. Nothing to write home about there. Shared restrooms with J class. None too exciting food & drink. They had a few internet terminals though which was good.
Then the long trek off to the TG lounge. Upstairs and pretty disappointed I must say. The open feeling of the balcony was cold and noisy. J class is basically on the other side of a screen. Not very cozy.
I was flying LH F to FRA (the afternoon flight) and they give you an invitation to the UA RCC so I went off there and was very, very impressed. I know you only got a quick glance but you missed the fantastic shower rooms they have. Not huge but still nice. The ORD and SFO UA flights had already called for boarding by the time I was there so I had the entire place to myself.
I'm not a *A kind of guy but I definately liked that HKG RCC the best.