I stayed 2 nights to Hannelore & Karl's house and it was a very nice stay. The room is small but comfortable, nice and clean. It is in a big house with a garden, if the weather is fine you can have breakfast in the terrace, it is very pleasant.
The access to Munich center is very easy, there is the bus stop Blumenau at 5 minutes walk. And then, with the bus 168 or 56 you can go either in Laimer platz, or in München Pasing.
Karl cooks very well and he cooks Bavarian cook hmmm, it was delicious!
To conclude, I recommend this room to everybody, if I have the opportunity I will go back there.