For a few to be immortal, many must die.
I really didn't want to say the same thing as everyone else about this, but it seems the consensus is entirely correct. In Time has an incredible concept which was beautifully timely (heh) considering the film came out right in the middle of the Occupy movement, and it was even well-executed from the start. There's no bad exposition here and it's not even a heavy-handed metaphor. You'll be surprised how naturally money becomes time and time becomes money. I loved the first half hour so much I watched it twice. I recommend that you watch this movie for that first half hour or so, but then you can turn it off. The timer will make you feel like you shouldn't be wasting your life away, so don't.