Depending on the expectations you bring to Apollo 18 it could be anything from 1 to 5 stars. My expectations were not overly high and I enjoyed it - but I don't think that for me it had any repeat-viewing appeal (i.e. I can watch a good movie three or four times in a few years). What they get absolutely right is the feeling that this is created from actual footage of a lunar landing. The various effects and distortions feel absolutely authentic, and overall the film does look like it takes place on the moon. The voice acting from mission control is equally perfect - and much of the acting does look like fly on the wall reality. With no spoilers - its also worth mentioning that Apollo 18 does not over do it's scares, relying mostly on brief glimpses, which for me worked well - but it's a courageous thing for a horror movie to do as a large part of the audience may well be hoping for a bigger pay off. For me what didn't work so well was that I don't feel the scares were exploited enough. I know it sounds like I'm contradicting myself - but I mean that not enough of a plot ever really developed to give the scary bits enough context. For example there was little sense of time running out even though the astronauts by definition had a finite supply of oxygen for example. There was also no sense that the alien presence had much intelligence even though for example flags were destroyed, suggesting some resentment of human presence on the moon. With more of a well defined plot, I think this would be a classic, but as it is, it is a very interesting piece of film making that may or may not float your boat.