The only reason I had not to stand up and leave was Joseph Gordon-Levitt, because my boots are made for walking. But his part, unfortunately, is neither long nor developed. Lukas Haas disappears in the beginning, which is also a waste of talent. Instead, we see Leonardo DiCaprio, just as he always is : not bad, not good. Ellen Page, here an actress in limbo. Cilian Murphy, in a character also unexploited. And Marion Cotillard in repeated appearances : love, murder, suicide. All the actors seem to think: "dont't be harsh, I know I am acting in a silly movie; I just do my best not to show." Alas! their idea of a nightmare goes to our consciousness (without stealing), and stays. The directing is nonexistent.

Too bad, I did not fall asleep on my chair, for maybe I would have woken up from this nightmare. The plot is of no interest : if you accept the stupid premises of those scientific dreams, you guess very quickly who will die and who will survive. Waiting for the end, 2 hours and a half are ten years long. The special effects are rather well done: they don't know they act in a mess, but the editing is loose in between.

Do not waste your time : take a good nap instead.