My boyfriend and I really enjoyed our stay with Umut! It was our first time to Germany so his instructions for finding the apartment and tips were very helpful. We were gone most of the day, so we actually only saw him for check-in, which was fine for us. He checked in with us a few times just to make sure things were good.
We visited in July, so the 6th floor apartment did get quite hot. An open window and a fan helped a lot. Only on Friday night was there enough noise that is was worth closing the window- so there is a trade off for noise vs. a cooler room.
The location is short walk from the center of Munich with lots of cute cafes in between.