Great little place, easy to get too and excellent location with it both being central and quiet.
Apartment itself has everything you need for a good and comfortable stay, shown very well in the pictures and in great shape overall with everything as described (sauna was a nice feature after a long day exploring Berlin).
Neighbourhood is quiet with restaurants and small shops (KaDeWe five minutes away as well as a larger grocery store next to the U-Bahn station.
Easy to get to, if you are coming from the airport just grab a train to Zoologiche Garden (RB14 usually) and it is a five minute Uber ride to get to the place. Key pick-up was as advertised and communication was effortless and timely with Roi.
Overall, highly recommended and would not hesitate to stay here again.