Excellent stay at Martin's flat.
Location is 5 min walk to Potsdam Platz, and ideal for walking to Reichstag, Brandenburg, Check Point Charlie and others. U-Bahn station 1 minute walk from flat on the very well routed U2.
Apartment is very tidy and well decorated, new feel, comfortable beds, and all the amenities you need for a week. Couldn't have asked for more.
Very well looked after, Martin was there to welcome us and check we were good before we left.
Couldn't recommend it enough!