If you like to be walking distance to blue mosque and Hagie Sophia, this is the place. First floor is spacious and can fit up to 7 people. You can easily grab a taxi or tramway from this location. Tramway will take you to Karakoy and Taksim. There is a larger grocery store 10 minutes walking away and couple of mini marts close by.
Don’t miss the museums. A museum pass would be great for 600 Lira if you are staying for a week in Istanbul and like to visit most of them. Blue mosque is under full renovation and there is not much left to see, most of it is boarded up and closed to visitors. I am not sure when will it open up.