I'd definitely recommend Matthias' house.
Matthias is a very communicable, friendly and warm host. He was responsive and helpful all the time, whenever before and during my stay. He was very understanding when I needed to change the date of my stay.
The bed is comfy. The bathroom is modern and clean. There is a cozy balcony and hip kitchen (though I'm not sure if I can use it.)
Overall the house is lovely and Matthias seems to be a interesting and sophisticated person if you have a chance to talk to him.
Thanks Matthias and his family.