This place is huge, I feel it will be amazing for a big company or party, as there's lots of things inside of house, like guitar or boarding games.
Good thing is that there's a metro station 15 mins away and Marmaray station 7 minutes away. There's heating, which makes this place good for winter.
There are some things, which I didn't like, for example, old furniture, lack of hot water (though the host, Deniz, wanted to come to fix it, but I didn't have time for it), and it's kind of too far away from main tourist attractions - you need around 1 hr to the old town.
The other thing is that the house has 2 levels, and to go to the toilet at night you need to climb down one tricky ladder and than go up another ladder.