I arrived with delay and very late at night and was still welcome and received with true hostmenship by Karen Sübler (Can's mother), who is actually the host (as Can lives somewehere further downdown). My arrival sets the story well. As Karen is a very friendly person that will do her upmost to serve you well as guest. She offered a breakfast, gave me lot's of very interesting information and was friendly and welcoming throughout my stay.
The house is beautiful, very characteristic (with all it's art and animals) however maintenance here could be a bit uplifted.
The only thing that I can mention as a remark is the location. It is well possible to visit downtown Istanbul from the area of the house, however it is a thorough expedition to do (as it will cost you 60 min up and 60 min down).
Considering that downtown (old center + Galata + Beyoglu) are really the place were most action is or starts from it is a bit of a hassle... The area itself however is wonderful. Do walk up to the beautiful Bosporus University (former RObert's University) and also do take a walk along side the Bhosporus (which is really at 200m) to fancy posh Bebek (and it's clubs and Yachts)