My friend and I had a great stay, really nice apartment and great location. 1 min from U bahn station and near lots of bars restaurants etc. Cool interiors and perfect space for a few days trip.
Only negatives were no air con which was quite stuffy in the summer - we requested a fan but it was still hot. And also the reception is not always staffed so we had to wait outside for a while when we were coming to collect our luggage after checkout (which we had stored there until our plane) so could have been bad if we were in a rush!