Communication with Marcus was great, both friendly and professional, very reliable with a minimum response time. The apartment was abolutely clean, something which is very important for us. The flat is spacey, the bedrooms of a good size and the beds comfortable. The kitchen was well equipped. The location is great, very central and close to U-Bahn (tube), S-Bahn (metropolitan train) and tram. Our favourite area in Berlin is Prenzlauer Berg boasting cafes, restaurants, shops and parks (including famous Mauerpark). This area is right "next door" to the flat.
Typically, there is not too much noise during the night even with the windows open, apart from the occasional siren. But considering it is a central location it's absolutely fine. In particular, the flat does not face the main road but is set back in a sort of courtyard. We had a spot of bad luck as irresponsible people partied on two nights in the flat diagonally across from ours. But this flat is also a holiday let, so it was just bad luck having stupid people close by for a limited period of time. We should have contacted Marcus immediately as he assured as he would have taken action. In principle, I think the holiday let platforms should try hard to weed out bad clientele. But I do not want to overstretch the issue of these two nights as in total we had a great time in flat and really enjoyed our stay of 11 days.