Best way for 4 pax to get to V Causeway Bay from HK airport?

It is suggested to take a taxi to your hote directly.
The taxi fare is around 280 to 290HK$ as a whole.
If you take the airport express, it takes about 400HK$ to HK Station and they you still need about several HK$ to Causeway Bay Station.
If you plan to take the public bus, the line A11 and E11 are your best choice. You can take either of them to reach Sugar Street, Yee Wo Street and then walk to your hotel easily. The bus fare is around 21HK$ for E11 with around 80 minutes and 40HK$ for A11 with around 70 minutes.