I was spoiled about the ending in today's newspaper review. But I'm still going to see it.
Gravity isn't the sort of film you can spoil. The ending kind of choreographs itself over the previous hour.
What's great about Gravity besides the impeccable visuals which are the best representation of 0g physics I've ever seen, is how it gives you the feeling of the uninhabitability of space and the helplessness of the astronauts.
I didn't think it was weird for the debris to destroy every place she went to, considering the orbit of the debris was such to cross that area every 90 minutes.
Still, I consider "She doesn't make it", "She makes it" or "She turns into a monkey" to be spoilers.