The flat is very good, nicely located close to Taksim and Beyoglu neighborhoods (not even 5 minutes walk to reach Istiklal avenue). The interior is beautifully designed, everything looks new but they kept the original features of the historical building. I also appreciated the wooden floor and the walls made of bricks.
Bathroom and kitchen were well equipped, and overall there was anything I needed.
The communication with the host was perfect: he shared a lot of useful recommendations and tips and was always available online.
I would definitely rent this place again for a future trip.