I really enjoyed! Taner and Nicola were so helpful and problem solvers (e.g., they changed the mattress 'cause it was little uncomfortable). I came so late like 2 a.m. and Taner was there! Welcomed me very warmly and cheerfully even in that hour! Great hosts...
The neighbour is quite safe (so don't listen to taxi drivers :D ) and it is really close to main and famous street Istiklal. You can reach to other places like Sultan Ahmet (Blue Mosque), Topkapi Palace, and so on very easily!
I like the place and hopefully will be staying for my future visit(s)!