Marc and Sonja are perfect hosts, very attentive and responsive.
The apartment contains all that is needed for a couple. It is on the first floor with a very easy access.
The area itself is not especially nice: it is quite noisy and not like the more quaint picturesque areas in Berlin, but there are places to eat nearby and supermarkets very near. There is transportation quite close, but the location is rather far from the major places of interest so the train rides are quite long.
The value for money was great - very functional, neat and comfortable loft for a couple.