I booked this place mainly because of the view in the pictures (also the bathroom looked cool) and was a bit afraid it wouldn't be so impactful in real life but then we got there and went to have breakfast in the terras (which was super delicious, by the way) and was taken back by such a beautiful view of the water (and the little birds that jump around the terras as you enjoy your breakfast).
check in was very fast and easy, the men in the office area were always there to assist us and offer their help. the women upstairs by the kitchen making the breakfast were very sweet; always had a huge smile after "thank yous" from happy and full guests.
They offered us a ride to the airport (for a fee, of course) and offered to clean our room when needed. toilet paper and soaps were also offered when we needed more.
The area is quiet and a short walk away from the center. it's really an enjoyable stroll away from the hagia sofia and the blue mosque.
earplugs are totally recommended if you're not used to the loud praying every few hours (we bought a pair down the street at a quick stop) also on the weekends, other guests can come in a bit drunk and their steps (and other not so appropriate things) are very loud and clear.
we were given a map of Istanbul which was of good use to us and they also recommended a small restaurant called doy doy. we ate there almost everyday after finding that every other place charged us way too much for being tourists. the food and atmosphere at the restaurant was great.
overall I would totally recommended this place and I would come back. fantastic place!