We enjoyed a fantastic three nights stay at Karstans Mitte apartment. Karstan was in the flat upon our arrival and spent some time with us going through his recommendations for the area and plotting them on a map for us. We tried some of them and they did not fail to be spot on! The cafe Yarok, Auguststrasse, the Berlin Wall Memorial and the flea markets were all much loved places we visited so thanks for your advice on that! The apartment itself was comfortable, exceptionally clean and we loved the interesting interiors. The location was perfect as it was near to a few cool streets in Mitte with cafes, bars, restaurants, shops etc, also the Wall Memorial and the flea markets - all of which we enjoyed the walk to. The subway is at the end of the road and only a few stops from the central touristy area to visit the Reichstag, checkpoint Charlie etc. Would stay in one of Karstans apartments again without question. Highly recommend!