Very convenient place to stay in Berlin. No staircases to drag your luggage up - entrance from the street. Nice size, with kitchen, sitting area, two single beds in the bedroom. Everything looked clean and worked well when I arrived. Never met the host, but had everything I needed. (The code pad at the door is a bit tricky, but works fine once you figure it out).
There was a tiny bit of noise in the evening (people walking, water in pipes) but nothing too bad. Would have liked hotter water in the shower, but this is just nitpicking. All in all it served me perfectly during a one week work visit to Berlin. Lot's of restaurants and shops, and public transit, very close by.