It is a very good indie with a similar story to OXV. I did not find it atmospheric or with great cinematography, but for the budget, they did well. If I were the filmmaker, I would look upon this with pride. As other reviewers noted, empathy for the characters is a bit difficult.
I did enjoy the score. I loved the premise, and the moments of lightness (OkCupid and "Landline") were well-done and necessary. The philosophical underpinning to the moral conflicts were excellent. This reminds me of stories like the rise of apple, Microsoft, and facebook, each is world-changing technology started by a few nerds.
I have to "ding" it a bit in ratings because production values could not let the filmmakers explain a few scenes as well as they needed to be. It also had some plot points that were annoyingly contrived (leaving the device at home). My biggest complaint is that it had some direction changes in the 2nd half that I could not follow quickly. The plot jerks around quite a bit. Usually that is a positive when the direction changes due to reveals; here it was not pleasant and slightly confused me. I had to re watch the second half, just to make sure that I didn't miss something.
It took my mind on a journey akin to OXV and to Primer. The best movies ping pong around in your brain long after the credits have scrolled, and this one does that for me. So overall, I enjoyed it.