The flat is lovley, a roomey studio in the north east part of Berlin it's five minutes from a tram station that will get you to Alexanderplatz in ten minutes, between that and the S-bahn station next to it you wont have any trouble getting around.
The flat was clean and Alan and Kasia had provided fresh clean towels and bedding for us. Alan greeted us outside and took us inside where we found a large laminated map of the city. Despite having two more check-ins Alan stayed with us and went through the map as well as a folder full of useful tourist information to make sure we got the most out of our trip.
The shower is amazing, we were traveling in October so the tempreture in Berlin was on the chilly side, coming home to a hot shower that you can set to just the right side of scolding is a god send and there's plenty of space.
The flat is quiet and peaceful, barley any noise from neighbours or from the street outside. It is also located near two supermarkets less than a five minute walk away so anything you need you can pick up easily.
Alan and Kasia know how to play host and so I would recommend staying at any of their properties if you want to feel looked after, particularly this one!