Alex's apartment was perfect for our stay in Berlin. It's light filled and looks even better than the pictures! Being on the ground floor also means no heavy lifting of luggage up stairs. It faces a beautiful internal courtyard which is much greener than most in Berlin and outside the apartment there's a deck with some outdoor furniture so you can sit there during the day. The location was great, a couple of minutes' walk from the schlesisches tor u-bahn station. Also close walking distance to bars and restaurants. The apartment was very quiet and away from the road so we slept well. Liaising with Alex was easy and he was very nice and speaks excellent English. You have to pay an additional tax for the city but it's not much. I'd highly recommend this. The two bedrooms were very comfortable and there is space in the main living area to leave luggage so you don't feel cramped.