We stayed 2 nights at Hellens. She is a very nice, cheerful, helpful person, she was a great hostess! She prepaired us coffee and strawberries in the morning, and tea in the evening, though there was no breakfast or whatsoever included. She also asked us several times if we needed anything, was always ready for a nice talk, but left us alone when we needed to study.
The room is easy big enough for 4, there is a comfortable bed for 2 and matrasses. The sheets and towels are really nice.
The neighbourhood is nice and peaceful, not central, but not far from the underground. And you can park your car anywhere on the streets for free. It's not commun in Munich...