It was an amazing stay definitely!
We, two people, stayed there for a week.
Faith let me check in earlier which was so helpful! The key of front door was so tricky to open for me that I called Faith. Fatih was nice guy, he will tell local tips to you:-)
It was very comfortable, clean and made us relaxed. Wifi is strong enough in the living room but weak in Bedroom.
Very good location to visit centre of Istanbul, there is bus station very near to house, so no worries.
I highly recommend this place to anyone who will visit Istanbul! This house made us so happy:-)