Sure hyperconnected millennials must find this very compelling since it just mimics their lives glued to screens. But as a cinema endeavour it was certainly a false good idea, akin to the 100% subjective camera 1947 Lady in the Lake. I mean this is an interesting narrative device to compress the time and establish suspense but as always thou shalt not overuse fancy techniques. Technique is not the movie, technique is barely at your disposal to make good use of it.

Had it been a cheap student project limited to a 1-hour runtime, it could have been brilliant. As such it is pretty frustrating to have to sit through a montage of people clicking away (mostly the father interacting with his computers, phone and his daughter's computer). IMHO it totally detracted from the objective of building up empathy for John Cho's character. Basically it put us in the head of an IT forensics officer rather than in the head of a father fighting fate.

Yet it is well-assembled, John Cho does a fine job and there is a clever (if rushed) ending. So, not totally annoying but quite frustrating.