I can't decide...
...if I liked this movie or not.
The performances were good, but I just wish that there had been a bit more substance. A lot of stuff seemed to come from out of nowhere - like Ruby's behaviour during the party near the end - why was she so familiar with the flatmate, how did their conversation actually end, and why was she so off with Frank afterwards? It's not that it seemed out of character...it was almost like there were details and moments missing.
There were also some wonderful details - Frank's sense of alienation amongst his friends, for example. The fact that all the big, group scenes are chaotic, unfocussed and unclear makes a really good, subtle point about Frank's attitude towards the regular people in his life. His building frustrations with John (who is annoyingly realistic) are also well done - you get a sense of the long-lived friendship between the two that stops Frank from punching John's lights out during his more dickish moments.
I also loved the window paranoia. You couldn't work out if he was actually getting robbed as he headed out with Ruby, or if it was his imagination going into overdrive, but it's an anxiety I recognised all too well.
However, there were also some things I really didn't get and that really hauled me out of the movie. The stills of Frank and Ruby's facial expressions pasted into one of their first conversations for example. Battering up the prop head that they had been working on - I think I missed something there... The biggest thing for me however was the last twenty minutes or so of the film. Watching it felt like wading through treacle, and the lack of resolution at the end left me feeling a bit hollow. I was invested enough in the characters to want more.