I bought the game and I love it...after playing for 15 hrs straight I am hooked...play on the hardest setting and try to get an A ranking..I DARE YOU...playing on easy kills the game.. when surrounded by zombies those quick time add to the pressure and if not timed properly..you die...so it is about skill and if you aren't paying attention you will miss your mark that not a negative its a nice challenge... I wasn't bored the entire 15 hrs..my only gripe is that I am unable to redeem my PSN mercenaries code...