This was one of the highlights of our trip to HK. You can either purchase a one-way or round-trip ride. It is highly recommended that you get the Crystal Cabin (the one with glass floor) ticket.
Although, I visited in January when it is chilly, the views were amazing. You get this great view of Lantau Island and Chek Lap Kok (where the airport is located) on your way to the top.
If you are arriving in HK in the morning, you can wrap up your visit here by the evening, because Tian Tan Buddha is located on an island right next to the airport.