I went about 18 months ago for 9 days. It is a long flight so it's probably not worth going for less than 5-7 nights. We booked it ourselves, we flew Finnair, who I was very impressed with, and seeing as we're a family of four we booked an apartment rather than a hotel. We went out for a family wedding, though we turned it into a holiday aswell. The reception for the wedding was held at the Royal Plaza in Kowloon, and this is where many of the guests who flew out from England stayed. We went in August, which is possibly not the best time to go as it is very hot but that was when the wedding was so we didn't have any choice!