The appt is nice and cozy with all what you need for a relax stay. The neighborhood is very good as well : Galata tour at 2 mins, the port at 5 mins, lots of grocery stores nearby and open till late at night, etc. The host is very reactive and helpful, I booked the appt for a check in within the same day and it was perfectly clean.
Will definitely think of it for my next stay in Istanbul.