We contacted the host last minute upon arrival and we got the response in the matter of minutes, so that we could get organized and move in quickly. Everything was so smooth, we were awaited and showed around. We were very happy with the place, it was even better then on the photos.
The location is great, just bellow the Galata tower. We are a family of 5, "teen-ager kids" didn't mind moving up and down the street :)
The flat is clean and comfortable, the "Turkish balcony" has a great view, we really liked it.
The only downside that has been mentioned in the comments, is that it can be noisy during the night due to the night life of the neighborhood and the birds, but we would choose it again even with this downside.
We hope to visit Istanbul again, one the main positive impressions we have is due to this great experience! Thanks Mine :)