When you see a 5.5 rating usually you expect near-trash stuff. Well it turned out to be so much better than expected. The strongest thing about this film is, you get what you expect from a thriller (suspense, twists, gore etc), but in a believable way. You don't get bored and constantly you have to question whether reality or insanity is driving the characters of the film. Adrian Paul is above average, Kate Nauta is fine but surely cannot pass as a... scientist. If it was shot with bigger star power, it would get the rate it deserves, but still a 7/10 is fine, considering the budget. Now the 100 people that rated it with 1 or 2, where surely expecting something else. My recommendation: see it
Review of 9 Miles Down
