Friedrich's place is clean and the room is very spacious and bright. Although I was very comfortable and slept great, my husband was a bit hot at night. With that said, the window does wonders to keep the street noise out, so I found it to be a very quiet apartment. In regards to Friedrich himself, he was prompt to answer questions, although we did not meet since he was out of town so we interacted with his flatmate. It felt a little awkward but was alright. We had to do quite a late check-in because of this, unfortunately. The location is great, although do note that the walk to Ostbahnhof itself is more like 15 min (not the suggested 10) and the address provided by Airbnb will not take you to the front door itself (Friedrich provides you with a more exact address in a message).