This movie is OK at best. It's one of Nolan's better ones at least. But, it has some serious issues. See Krauss talk about it here: https://www.youtube.com/watch?v=7pG89gREWyI&t=1m12s

It's too long - he's right. The oxygen blight is completely scientifically silly. The entire basis of the plot (that Earth will run out of oxygen in tens of years) is unbelievable. This put me off from the start. There's some "formula" that Michael Caine worked on and half-solved, but it took data from the event horizon of a black hole (which also makes no sense scientifically) to solve it. Sorry, if you approach a black hole, you don't end up behind a bookshelf in your old house in the past - I have no idea how they can claim this is a movie about science. It is FULL of religious symbolism, though, so if you're into that, you'll be right at home. Apparently humans evolve out of the 3rd dimension too ... sure. There's one thing that was definitely right - outer space is quiet - FINALLY.

The cinematography is pretty good, and I liked how the dude went crazy on the barren planet, but this film would have been a lot better without the sappy happy ending. I mean, really - transporting all the way back from inside a black hole? Armageddon had a much more realistic ending than that, and it was SO STUPID! It would be great if someone fan-edited this into something scientifically accurate (dub over the lines about what's wrong with Earth replacing it with a feasible problem, have him crushed to death in the black hole, show Brand on the planet at the end all alone, FIN). I don't know how people can give this a higher rating than a 7/10. I wouldn't consider it to be a classic at all. It's at best a see-once blockbuster, just like Armageddon was.