There are some good ideas here, but a few minutes' thought about the film's inconsistencies will ruin them for you.
The movie isn't bad. It held my interest when I was looking for something to pass the time. There were a couple of clever visual jokes having to do with not being able to tell a woman's age (and, thus, what relationship she might have with another character: mother? wife? girl-friend? daughter?)
A clarification needs to be made, however: the movie really isn't talking about "time," per se, but "longevity." Time isn't being rationed, people's lives are being artificially limited. The failure of the filmmakers to get this straight accounts for a few annoying inconsistencies. A better movie might have explored more deeply the ideas of longevity as currency and artificially imposed scarcities.
Seyfried and Timberlake are decent actors and they do a good-enough job here. Cillian Murphy makes the best of the single dimension he's forced to inhabit.
The movie was free on Prime, so no money changed hands. Just time.