We are a couple and we had a great weekend at Sophie's place. They were very friendly to us and accommodating with checking in times and such and left the apartment very clean and with all the necessary comforts. Also gave us some nice recommendations for places to go to in the area.
The apartment is really nice. It was quite hot in Berlin while we were there and it was cool and breezy inside, and surprisingly quiet given how busy the street is. Lots of good food, bars, and transport very close of course :)