Walter is a great host! He is warm and welcoming and made us feel right at home. When issues did arise, he went the extra length to make sure that they were fixed to our liking. Walter was great about giving us space when we wanted, but is a sharp guy who is open to conversations of all topics. My boyfriend loved having the chance to go play tennis with Walter and his friends several times over the 2 weeks that we were there. Also, it has to be said, the house is incredible! If you are into sustainable architecture or just appreciate a house that is out of the ordinary, then you should absolutely check it out. The atrium is more or less a small botanical garden with lots of light. We found it inspiring. Best wishes Walter until we meet again!