The location was convenient, with easy access to public transportation- both trams and S-bahn. There is no direct communication with Mark, really, but rather Martina and Marcel, who seem to manage the apartment for him. Marcel was readily available. The apartment itself is rather comfortable, aside from the lack of A/C (especially considering the summer), the four story climb, patchy wifi at times, and lack of frying pans. Otherwise the apartment was well kept, clean, and quiet. All in all, it's what I would have expected for $77 a night.