I would absolutely recommend staying at Joachim's apartment. The place is even better and bigger than described/pictured, in a quiet residential location. It's light, spacious, and well-equipped. The location is good, and only a short walk from the u-bahn. No problem getting around. Joachim was a great, communicative + very thoughtful host (having left us some sparkling wine in the fridge for one of our birthdays!). Would recommend to all.