What is the best option to transfer from HKIA T1 to Kai Tak Cruise Terminal, Kowloon Bay?

Take bus line A29 from Airport (Ground Transportation Centre) to Lower Ngau Tau Kok Estate, Kwun Tong Road Station. Then, change to bus line 86 from Kowloon Bay (Telford Garden) to Cruise Terminal. The fare totals HKD 47.5. The trip takes about 85 minutes.
If by taxi, the fare may be around HKD 300 for the single trip.. :)