Our family of 7 (4 adults, 2 teens, and a 9 year old) spent 8 nights over Christmas in Dieter's home. It is a clean and comfortable home in a nice, quiet neighborhood with a terrific location close to the tram which is convenient for getting to downtown Munich. It is also close to a grocery store, pharmacy, and restaurants (one of which, Risotto, was recommended by the host and was very good).
Dieter moved around the furniture to enlarge the dining area to accommodate our large family which was appreciated. The kitchen was well stocked with cookware and easy to use.
Sleeping arrangements for 7 were okay for us with our 9 year old on the somewhat small pull out bed in one of the bedrooms and our 14 year old son on the couch. If you have 7 adults it would probably not be ideal but was fine for kids.
There was not available on premises parking for our rental car, but we were able to find free street parking - sometimes close by and sometimes a bit farther down the street or around the corner, but it wasn't an issue.
We were able to use the washing machine which is convenient but know that clothes have to be hung dry which isn't a problem but took some time due the cold weather. I imagine it would be quicker in the warmer months.
This rental was clean, convenient to get to places from (by public transport or car), and comfortable. The only real drawback for us was the spotty WiFi which showed connected but actually only worked from 3 - 6 hours per day. It was especially hard for my husband who was trying to work in the evenings, but fortunately he was able to manage. Overall, we had a good experience and would recommend it.