This film had the potential to be one of the best sci fi this year. It's low-budget, yet the actors, the scenery, the CGI, the costumes, the effects, the music, the sound they are all top quality.
The direction could have been a bit less cliché at times, in how it handled scenes with "he's watching you" tension. But action/battle scenes manage to deliver a hardcore experience while keeping the atmosphere claustrophobic. I love especially that the battles make sense tactically (except one detail on one scene).
The film manages to pull off its universe. It keeps things believable and consistent. It takes care to explain to the viewer what is happening in terms of technology, without detracting from the action and the suspense.
BUT, the script is horrible. Just when the film manages to pull you in, there comes a bad line or a glaring plot hole to wrench you out again. The actors are great, but they can't shine because their lines are too unrealistic or non-sensical. It made things awkward. On one hand the actors do their job well, on the other hand, you know they are actors because no one in real-life would talk like that in any situation. It's like the script writers made a list of topics to include, but they never filled them out. Dialogues jump wildly from one point to another. Emotions and characters are given the spotlight in one scene only to be abruptly shut down the next.
The plot holes create too many questions. I found myself too often thinking "but that's not how it works" or "isn't this supposed to be different?" or "what happened between here and there". If it wasn't for the bad script I think this film would have easily been an 8/10 for me. Maybe even better.
