I saw it last night in imax 3D and thought it was amazing. Fassbender pretty much stole the show. Obviously the script isn't perfect(thanks Lindelof, you fuck) but really the only problem I had was that it felt like there was music playing during every scene. I love the soundtrack but I felt like just the ambiance of the world or just the dialogue of the characters would have been enough sometimes. As a die hard Alien fan I would give it a solid 8/10.