Pretty neat place. My friends and I tried to get into Ku De Ta (the bar at the top) but we weren't dressed well enough, so we decided to go to the Sky Park instead. Admission is about $23 I believe, which isn't too bad compared to other similar to sky park places around the world (Eiffel Tower, Empire State, etc). The process going up is very much like the Empire State--they snap your photo with a green screen in the background, but here's the difference. By the time you've taken the elevator up, they actually have your photo printed for you to buy. I think it cost $50 though.. we thought we heard $15 but when we clarified they said $50 to us which is absolutely absurd.
Anyways, the view. We went a little before sunset and then just bummed around the top which was pretty typical. I've never seen so many people actually sitting at the top of one of these sky park things. The place is pretty spacious and the ground is wooden and it is pretty clean. You get a fantastic view of Singapore--from the Garden of the Bays and the Singapore Flyer on one side, and then the CBD on the other--it's stunning. It's great when you stay for sunset since you can watch the sun go down and the nightlife begin to wake up. There's a small concession stand that sells some food and drinks if you get hungry as well. I would highly recommend to anyone though--it's a great way to orient yourself to Singapore's layout and the view is quite stunning.
tldr; awesome views of Singapore at a decent price, worth the visit!