. . . Are spoilers.
None here, I just finished watching it. Thought it was a tense, breath-holding, truly horrifying/saddening, adventurous, fantastic tale. I don't know enough about rocket science to contend with the quibbles that it seems others had with the technology and conduct of the astronauts, but nothing stood out as flagrantly stupid as hey, let's touch the cobra-like creature that just crawled out of the black goo from the last space epic I saw.
I was quite consumed by the movie as I was watching it. I genuinely felt for the characters. Ignore the haters on the main page - It's pretty decent, and definitely worth a watch.