This is an underrated gem and a great find - excellent for solo travellers or couples.
Comfortable, clean, well lit, and warm. Wi-Fi was strong, amenities were all in good working order, and overall just a really pleasant environment with clear attention given to tasteful decor (Markus placed a few bowls of scented wood / incense around the room, which was a nice touch).
Location's outside Munich city central, which isn't really an issue as you're a short (30min) hop away from town. Area around this flat is quiet, safe, and clean, with families and elderly making up most of who I saw around.
There were some minor hiccups to be aware of, but Markus' response time is quite fast so nothing we weren't able to resolve in an hour or less. The flat could use some English FAQs (e.g. on what the Wi-Fi password is); and the address on this listing isn't accurate - Markus will give you the right address, but GMaps' location pin isn't accurate (as of this writing).