Really nice and spacious airbnb in the center of berlin! Subway station is 2 minutes away. The door is equipped with a nuki lock which you can easily open/close by using an app or entering a code. The apartment is inside a building complex so you need to go through the main building's door first. Unfortunately the keys were inside the apartment so we had to wait for residents to get there and let us in so we could get in and get the keys for the main door first. Other than that absolutely amazing.