This was compelling enough but if you strip away the novelty (how most of our behavior is recorded today by some digital means or another) it's not much of a story. You can tell who the prime suspect should be right away and the red herrings are fairly obvious. If you relax and let yourself not overthink the story, you will enjoy it. The novelty of all the sites, channels, accounts, and found (online) footage was certainly interesting to a degree, but at times it seemed like a research project I had to endure. But my biggest problem was the acting. The minor roles took it downhill: work colleagues, the 911 operator, the piano teacher, some of the students...many sounded very "Law and Order" with the overacting and over-articulation, especially the voice-only roles. John Cho as the father was earnest enough, but he didn't exactly set the screen ablaze. Ditto Debra Messing. But it may have been their characters, neither of which was written to allow even the suggestion of a smile to appear across their faces, because, y'know, people in serious situations are not allowed to smile, lest it confuse the audience. Sara Sohn, however, as Pam, was excellent. The sheer number of "555" telephone numbers was also a buzzkill. One instance of the old, safe 555 number takes you out of a movie, momentarily, but having an abundance of them nearly launches you permanently out of the mood. People get so many obtrusive calls from telemarketers and scammers today, I hardly think that someone calling a telephone number because they see it in a movie is going to cause much of a ripple. Dumb practice that should be retired.