My friend and I stayed for 3 nights and enjoyed our stay.
The apartment is fairly spacious, and has everything you need. The beds are really comfy and the place it clean.
Although because it is in the basement, there is a slightly musty odour, which can be easily solved with ventilation - however, it was too cold to leave windows open during our stay.
The apartment is an easy 5 minute walk from Marienplatz and very handy for exploring Munich.
Things to note:
Follow the direct instructions for getting into the property carefully (theyre very helpful) and ignore the map location on the listing because it is not accurate.
There are no curtains/blinds inside the apartment - the up and down switches in the walls control electric shutters on the outside of the building.