Ever wondered what Bouncers have to endure while "guarding" doors/working at night? Well this will bring you one step closer to get into their heads and mindsets. Hearing from one, that he can feel if someone is trouble and therefor not letting those individuals enter - you'll either buy what he is saying (experience wise) or you may question if he made mistakes too (also experience wise).
Apart from getting snippets from night life (of those bouncers we get to follow closely in Berlin), we also do see them in their free time and talking about their job. Also their other passions at times - like photography for one of them - nude art at that. If you don't mind seeing some "models" showing off what their mama gave them - or are not offended by what is shown. Although if you are offended I reckon it would more likely be by what is being said at times, rather than what is shown (also before a photoshoot that is supposed to be nude - all clothes off, though you won't see anything apart from rare behinds and the breast area - in case you were wondering).
All that aside, it is at least fascinating and if you've been to Berlin it is quite likely that you may have been to certain spots (not the clubs necessarily, but the outside locations that are shown for example). Berlin was reunited with the rest of Germany - but don't expect this to be the definitive guide to a unified Germany ... it has snippets from many things including some part of that history too of course.