Great little apartment. Characterful and quiet. We had no hassles at all and Oliviers communication and help excellent.
We'd definitely stay here again and recommend it.
Never expected to be staying right on the doorstep of where the Berlin Wall Boundary used to be.
If interested don't miss the Exhibit by the exit of the Tube station which served us well during the trip.
Travel dead easy from Teigel Airport by Bus then U8 tube straight to Bernard Strauss Tube a short 5 min walk from Oliviers flat.
€7 AB Day card (Tagesgarte) perfect way to get around the city to pretty much every sight we saw either by train/tram/bus/Tube.
Don't bother with the BVG app as google maps is way better at working out trips.