Marcus was not there during our stay, but it all went very smoothly. His housekeeper let us in. The appartment is spacious and clean. The location is great. Easy walking distance to Stephansplatz, shopping streets, opera etc. The appartment is very quiet for such a central location. So you can get a good night sleep. But because it is facing small inner court it is also very dark and cold. Luckily the heating system works well, so once you warm it up it is a very cosy place to stay.