Some good acting and what could have been a reasonable plot but whatever they were attempting to do with the main character failed miserably. He may well have been a tortured soul seeking redemption or whatever bumf has been written but in fact was played as a deeply unpleasant, arrogant man with serious anger issues. Sadly, there was no recognition of this from the character and what remorse was shown was mostly of the self pitying variety.
Single character films only work when the audience invests on the main character, I wanted to see this one frog marched out the building, he was that painful to watch.