Great stay in Ulf & Caroline’s apartment. Very clear check in instructions and they provided a detailed list of recommendations which was useful! The location is in a cool area with lots of tasty food options (would recommend buyu ramen and kimchee princess) which are both <5mins walk away. Convenient distance to public transport, just make note that this place is on the 4th floor with no lift, so not the easiest if you are unfit / on the evening after Berlin marathon :)