I lasted up until she starts dialoging with herself.
I had no idea this movie existed but the premise as summarized by my TV made it seem interesting. Immediately the film seemed like it would be meh but then the shots of all these perfect looking human/alien people and the pretty but not too much lead figure and some very tacky camera shots meant to highlight something edgy or oh so cool but failing... then she starts talking to the alien in her body and it sounds like a 13 year old girl wrote the script.
How am I not surprised that this is associated with Twilight. Gross.