I ended up making two reservations because I stayed an extra day. Yusuf was very flexible and let me stay in the same room, which was nice - he's good at coming up with solutions on the fly.
Directions were easy to get there and on arrival from a long flight, he has great cookies and tea ready! The place is super chic with exposed rustic elements. The furniture in the rooms is extremely comfortable - just as pictured. There's also a great roof deck and the rooms have well equipped kitchenettes, but given that the place is maybe 600 meters from the Hagia Sophia square, and a bunch of cool cafe's and restaurants, there a lot of other places to check out in the vicinity.
Yusuf was also super fun to talk to - and his partner who was available at night was similarly super welcoming. He was able to recommend a great rooftop restaurant with a 270 degree view of the city - amazing.
The place is also super secure - someone is at the front door 24/7, and they were able to arrange and negotiate a good priced taxi to the airport at 3:30 in the morning.