As far as movies go this was as average as it gets. Not great, not bad. It had some interesting parts, and some boring parts and they essentially balanced each other out.
The characters were interesting and I liked the dynamics, but I wish they had gone more into detail about their motivations. Some of them had intriguing pasts I would have liked to see that the movie barely covered.
The overall concept was engaging, but could have been much better.
All in all I would say it's a decent one time watch if you're bored and want something to take up nearly two hours of your time. It's enjoyable enough, and maybe worth a watch for hardcore sci-fi and psychology fans.
So watch it once but don't expect it to change your life. I certainly don't see myself looking back on it much in my future.