This place is a great homebase to explore Berlin from, especially Kreuzberg and surrounding. The location is great. It’s a souterrain apartment so it’s not very light, but that’s okay because we were mostly outside during the day.
I think booking this for 9 people is a stretch, the sleeping couches were small and uncomfortable. One of the sleeping couches was meant for 2 but that would be very (a little too) cosy. The place was super clean and linnen and some shower gel were provided. All in all would recommend!