Missing surprised me by having an excellent plot with great twists. So I was disappointed that they couldn't leverage that plot to produce an excellent movie. For me, the way they shot this movie destroyed it. The fact that the main character was about the single most unlikable teen girl didn't help either.
These days, production values tend to be high, so what about the way that they shot this is so bad? It's all cell phone and webcam footage. When I say 'all' I mean every damn frame of this movie. Most of the footage is the main character sitting at her Mac Book. We watch as the teen slacker navigates websites, and interacts with other characters. I get how the occasional scene filmed that way could be evocative, but trust me when I tell you, by the end of the movie, it's infuriating. I saw it as cheap, boring, and lazy way to tell a story. That's how they got this wide release out the door for $7 million.
Then there's the main character. I actually forgot her name. She is a lazy teen slacker who has a scare because momma money tit goes missing. The first part of the movie is a rote, parents-away-kids-party sequence; the kid throws a house party with the 'emergency' money that mom gave her while she's away on a trip. She's so damn lazy that she hires a maid service to clean up after the party--on mom's dime. Even worse, the kid is a camera, not a character. She has no distinguishing character traits, goals, aspirations, or ambition.
Also, as good as the plot is in essence, there is a huge plot hole near the end that amounts to the movie chickening out, lacking the guts to give us anything but sunshine blown up our collective asses at the end.
My suggestion is that you not watch this movie. Even intoxicated, enjoying this movie would be tough.