Moe is super friendly and the space is really ideal for someone like me who was in need of a room for a week while doing some research in Berlin. Charlottenburg is a wonderful area and I highly recommend any chance you have to stay in that neighborhood. Moe's place is fairly spare in terms of amenities but it is great to have a half-bath and little refrigerator in the room.
Only really had two complaints. The arrival process was not smooth at all. I was already staying in the area and simply needed to move a couple blocks to get to Moe's place. His listing says flexible arrival time but he happened to be out of town that day and his son let me in. Unfortunately I had to leave my place at 2:00pm and his son couldn't let me in until 7:00pm. So I had five hours to wander around with all my luggage. Not ideal. All that needs to be done is a little more communication from both of us up front about arrival times.
I was getting up early so it didn't bother me, but the apartment is immediately above this cute little bakery and they are up and cooking early and that makes noise in the courtyard outside the window. Not a big deal, but some visitors might mind.