This was one of my favorite stays with airbnb ever! The flats themselves (the gray and light blue photos) were really clean, nice, and comfortable. There is also a balcony area just one staircase away with a great view of the ocean. The location is also great--in a safe area and really close to the blue mosque, hagia sophia, grand bazaar, public transportation, etc. Yusuf was also an amazing and trustworthy host. He was very friendly and helpful, and gave us plenty of good advice. The lobby was open 24/7 with tea, coffee, and snacks, and the staff was able to arrange us shuttles to/from the airport as well. Whether you're staying in Istanbul for the first time or not, I'd highly recommend any of Yusuf's flats in Cube Suites.