The apartment is great, cosy and in a perfect location. It is situated so close to all the places of interest, that you'll not even buy a tram ticket during your whole stay! Galata Tower and Istiklal are right behind the corner, however the street of the house is very calm and you'll not be disturbed by any noise.
There are 3 bedrooms, not big, but cozy, there is a kettle, coffee machine, tee, everything you need for cooking.
We were in the winter time, and the apartment is very warm.
A separate topic is the hospitality of Eyup. He responds very fast and is flexible with the timing, gives great recommendations about the places to visit and is a nice and open person.
I lived there a week and felt as if I came home!