Our family stayed 2 nights in Munich. Stephan and Marcel were great hosts. They met us out front at the agreed upon time and were very hospitable. They gave us great advice about where to eat and public transit and provided complimentary bottles of water and even a bottle of wine.
The apartment is located in a quiet, residential neighborhood but is very convenient to either the light rail or underground stations. You can get from the apartment to central Munich in around 25 minutes, including the walk.
Overall, a great stay. We would definitely stay there again if traveling to Munich.