Hayrullah was a gentleman and super nice guy and I definitely recommend staying at his place.
Every time me and my girlfriend wanted something he was super helpful and very fast in responding to us. The area is super safe with good access to almost everywhere.
You can take the fairy with in 10 min walk to the Asian side like kadikoy and other places .
Only thing I would say is there is hotel being built next door and you might wake up
With building noises