We loved the location!!! perfect starting point for walks and several tram lines right outside the door! Apartment is new and nicely done, and was very clean. also great to sit on the small balcony.
Elena was very nice and responsive and handled issues with check in very quickly.
Our biggest issue was the lack of proper curtains which in Berlin summer means kids don't sleep before 10 and wake up at 6 as it is bright daylight in the apartment. Hopefully they can fix that!
otherwise we liked the place (even if the building/hallways etc were pretty dirty)