I super recommend this place if you are staying in Istambul.
I was there for just a day, and the location is great, easy walking distance from the historic center, and great places to go to eat close by.
The environment and everybody from the staff are very welcoming, and great communication, even before we arrived. The room was very comfortable and clean, the breakfast was delicious with an amazing view! My only regret was that I couldn't stay more days there!