I visited the Big Buddha on Lantau Island, and, if you can endure the steps (268 of them), the huge bronze seated statue does not disappoint. I went in the morning, (to avoid lines at the cable car), but, there was still about a 20-minute wait. It's warm and muggy in Hong Kong in late September, but thankfully, the staircase is bounded by greenery on both sides which provided much needed shade/relief for overheated visitors.
Before you reach the steps, you're gonna past a slew of souvenir shops/snack bars.
The cable car ride up is just as impressive, (and lasts around 20-25 minutes), though, each carriage allows only 4-6 people. And, they are not air-conditioned. (Open windows are your ventilation). The cable car station is an easy walk from the Tung Chung subway stop.
FYI: take an umbrella, I used mine to keep the sun off my head/neck. (Or if it rains).