I can recommend to rent Christophs flat to everyone who likes a cozy, well-located and minimalistic accommodation. I enjoyed my stay there. I loved the wooden floor and the atmosphere at night. With a little bit of parkour through the windows you can even access the terrace (blinds were stuck) and the open WIFI at the Karlsplatz lures you to go outside. An unusual favor I was asked to do was to clean the flat before leaving to keep the cleaning costs down. Which I can understand but it should be noted before one pays. I would stay again nevertheless.