Very good location at the heart of kadikoy, plenty of good restaurants around and easy access to metro. the room is neat and cozy, the ventilation system works, and Ilayda is a very kind and responsive host that is ready to help and provide you with travel tips or attend to your concerns.
the only reason I am giving this place a 4-star rating is because the room has sound-proofing issues. Water flow in the toilet is very loud for some reason. So if you don't want to be woken up every time a flatmate uses the toilet or the kitchen, earplugs are indispensable.