This was my second stay at Christa's place. She is a great host, I reckon one of the best in Munich that I've stayed with over the past 6 months. This is going back to what Airbnb probably set out to be: Staying in someone's home with them in a neighbourhood - a real local experience.
Christa is very friendly and invited me for dinner one evening. I've also been treated with some fruit, biscuits and tea in the evenings - a great touch.
The room is comfortable and had everything I needed. The small round table worked well for me to put my laptop on and do a bit of work.
It is between 15 and 20 minutes' walk from Haderner Stern U-bahn station and in a very residential area. From there it is around 20 minutes on the train to Marienplatz.
I can recommend staying with Christa when in Munich.