I stayed in Hubert's place with a journalist colleague during the film festival. It is brilliantly connected - the U-Bahn is right outside the front door and you can be in Postdamerplatz in less than 20 minutes. The apartment itself was very homely and welcoming, it felt like a real Berlin home that someone had been living in until the day before. The only small downside was the ongoing construction work next door and also in the external stairwell. But once this is finished, this will become a perfect Berlin base.