The reviews and the synopsis are misleading. It's made out to be a time travel movie when in fact it's more about expressing the same events and concept in different realities as Hugh Jackman's character moves through grief over his wife's illness and death, his inability to prevent it in time, and finally coming to terms with it all in the end.
Not very deep or thought provoking either, unless you're a complete simpleton.
Also to note, I'm pregnant and crying at everything, but this film failed to move me.