No doubt I'll return again. Everything was great. 100% recommend this place.
Pros:
+super location near all necessary places (like metro station, Galata tower, istiklal street, chainstores supermarkets, restaurants, ...)
+great and helpful host (thank you Bahadir)
+easy check in and check out
+big house (exactly like the pictures and even bigger, I think it's suitable for 6 people not 4)
+sound proof windows
+the house has elevator
+super clean
+fully furnished
+you can heat the house easily
+hot water with great pressure
+....
Cons:
-nothing