I thought it was a decent film. The premise set it out to potentially be an exceptional one, but the script was somewhat lazy or lackluster. The whole idea of currency being directly tied to a person's actual life (the currency being time, which would kill anyone whose arm reached zero) is interesting.
I would've preferred if they toned down their mentioning of "time" practically every other minute. 'Cause you know, realistically, we don't go around constantly saying, "Dollars, dollars, dollars," but I had the feeling that they kept throwing out all those words as if they thought the audience would forget that everyone uses time as money. To me, it was a little overused, which made me chuckle a few times.
All in all, it was a good idea that could've been executed better, and yeah, a pretty good movie. I'd definitely recommend 50/50 over In Time, though. But would suggest this one if you want a non-mindless action movie to see.