I go on sometimes* about plausibility and contrivance being qualities of a movie that can satisfy or turn me off, respectively, very quickly. Moon is a great example of a movie with the potential to be very contrived, but I thought it led us into Sam Rockwall's character and his situation with enough plausibility that by the time we get to the really out-there stuff, we're pretty much along for the ride. I've really only got one big quibble with the movie… and this is really a movie that's hard to talk about with spoilers. So I'm give my grade and then we can talk about the movie in more detail after the jump.
FuzzyCo grade: A
* Maybe more in person than here.
Is everybody gone who hasn't seen the movie yet? Good. So, what I mean about plausibility is like, we see that opening promo video and it promises a shiny corporate future, but then as soon as we meet XXX he's all unshaven, XXX the robot has post-its on his case, the place is a mess — we see that this is still a very flawed, human future. And so by the time we get to the clones, the part of my brain that might be wondering about questions like "oh, so they have the ability to implant memories, what kind of technology is that" is instead occupied with the whole notion that, yes, if corporations had access to disposable people, of course they would chew them up and then discard them.
My one big quibble, since I mentioned it above, is the whole notion of the communications jamming towers. Why wouldn't they just have some sort of kill-switch or fakery built-in to the station's communications mechanisms? It seems very contrived to have the complete apparatus to communicate with Earth in the station and then build a whole extra set of equipment to jam that signal. If I was speccing out that system, I'd point out that each of those jamming towers is a whole point of failure and a big expense instead of a problem that could probably be solved fairly easily in software.