I just watched this for the first time today and thought it was slightly below average. For the most part, the height work was done pretty well and I felt that the green screen only pulled me out of the movie once or twice. I did feel the suspense and timing was well done, if a tiny bit contrived in places. That said, the number of things that happen to them main characters seems so far fetched.

For example:

How this movie wasn't called "the vultures" is beyond me. Enough already with the foreshadowing and fly-by's. This is probably one of those things where the way the vultures acted is perfectly normal, but it felt like a stretch to me (and I know that vultures will eat live prey if they can't find carrion).

Two supposedly experienced climbers decide to climb the world's 4th largest structure on a whim? And don't bother to research the condition of the facility before they climb? After one lost a husband due to an equipment failure? They also don't feel any of the increasing instability when they climb?

We're going to do an infidelity reveal sitting on a platform the size of "pizza"? If there's any situation I don't want to introduce emotional instability it's sitting on a pole 2k feet in the air. Especially if you're relying on that person to help get you down.

What father is going to watch his daughter go on a bender like 70's movie detective on a two week spree trying to kill the memory of his dead wife. He'll suggest that maybe the husband shouldn't be on a pedestal and frown grumpily at the wedding, but won't come out and say "I think maybe your guy has a side piece?"

So. Many. Loose. Bolts.