I stayed at Katharina's beautiful apartment for five weeks in late summer 2021. I was originally scheduled to stay for only four weeks, but at the end of those four weeks I was simply not ready to leave - I was enjoying my stay too much, and extended it by one more week.
Well, what can I possibly say that other reviewers have not already said...? The apartment is located in what is arguably the most desirable neighborhood in Munich, "Viktualienmarkt". It is around the corner from the actual market, which means that I was able to walk five minutes every day to buy delicious coffee and fresh produce. It is also less than a 10-minute walk to Marienplatz, sort of the center of Munich.
The apartment itself is exactly as pictured in the online images: sunny, clean, nicely organized, beautifully decorated. What the pictures can't tell, however, is how wonderfully quiet it is - I haven't slept that well in ages. It is also fully equipped with kitchen utensils and plenty of extra sheets and towels. It will be hard for anyone not to feel completely at home there.
Katharina's son, Michael, was my day-to-day contact during my stay. He could not have been more thoughtful, accommodating and responsive during my stay. He also provided me with various tips of where to go and what to see, which made my experience in Munich that much better.
In short: a complete delight. Next time I'm in Munich, Katharina's apartment will be my first choice for accommodation - however, I am quite sure it may be already booked, haha.
I could not recommend this apartment more highly. However, you will need to have some luck in order to actually get it.