Martin's apartment is brand new, very confortable and he is easy to speak with.
The whole building is now being renovated, so in a few weeks it all will be 10/10.
The only inconvenience we had was that workers were performing renovations in the building the days we stayed, and we had to speak a couple of times whit Martin to sync with them on the best time for get things done.
Anyway the place was great, so I'd probably reserve again in there.
Thanks!
PD: It is a perfect location for those spending a few days during the Oktoberfest, as it is 5'-10' walking distance from the Theresienwiese.