We stayed in August 2019 for the whole month. The appartnent was very convenient, close the shops, the mall, the subway, the memorial, the park... We could not have hoped for a better location. Communication wit Katarina was fast and effective, with all the information we needed and more. Checkin and checkout were easy and well handled, even if we arrived early and left early. Highly recommended if like me you have to spend some time in Berlin for work.