I watched this movie with too much hype for what it was. People were telling how great the time travel was and how twisted but consistent the time travel was, but I didn't feel the same
Yes, the kludged time capsules that travel through time at 1 second per second and that can't go back before they were turned on is original and interesting. Having to spend basically 12 hours to go back in time 6 almost defies the purpose of the whole thing.

But I have to say that in the end, I kind of disappointed me. The main failing, for me, is [spoiler]the whole party thing. I never was made clear what was so important about it. If Aaron had successfully defused the situation in the first place, why was is so important to go back? Also, it's not very clear how could they make many attempts since that nature of time travel in the movie means that they cannot go back to the same place at the same time without encountering their pasts selves. [/spoiler]