Watched this film for the first time about a year ago. I have to say i was a bit apprehensive about watching it at first after hearing that all 96 minutes of it took place in one single room, but it turned out to be one of the best films i've ever seen(and also in IMDb's top 10 of all time films). Such a simple concept and story line but i've never been so gripped.
'What begins as an open and shut case of murder soon becomes a mini-drama of each of the jurors' prejudices and preconceptions about the trial, the accused, and each other. Based on the play, all of the action takes place on the stage of the jury room.' I'd definitely recommend watching it, if you haven't already seen it.