Stayed at Karibuni in January 2016. The staff is friendly and helpful. The rooms are well kept and well equipped. The Wifi was sketchy but I suspect this was just in my room. It is a pension so you will hear the neighbours, but for the price you can't go wrong particularly if you get a room with a bath. Karibuni is one minute from the subway, three minutes from the Sonnenallee bus lines and surrounded by shops of all sorts. A good option in Neukolln.