Competent, but annoying
I won't give this a 4 or less because of its mere technical merits. This is a movie, produced like a movie, with a budget, director, and decent enough cast.

It is, however, not worth more, as it is a bad plot, with nonsensical "twists" and a mystery that is no fun, and falls apart on its own. The ending is also very very weak. I cannot recommend this movie at all.