I stayed at Matthias place for two nights. The place is very cozy and the room is very big and comfortable. Matthias proved to be one caring host and showed unmatched hospitality. On my first night, he got to know that I was visiting Vienna for the first time and took some time off to show me around the nearby places. He took care of even the smallest things, from making sure that I have eaten well to marking and explaining the maps to ensure that I dont get lost in the amazing city. All in all, Matthias and his girlfriend are one of the most nicest human beings I have ever come across. I would love to stay at their place again if I ever visit Vienna anytime soon. Cheers!