Overall a stellar experience with this stay :)
The room was very clean and has beautiful architecture and design (an excellent blend of history + modern updates) with a large, comfortable bed, high ceilings, and a large, recently renovated bathroom. The building itself features a lot of original architecture dating back to the turn of the 20th century. Beautiful views of the Bosphorous can be seen from several areas of the building, and there's also an excellent restaurant downstairs that offers live music on weekends.
The location is really close to a wide variety of shops (clothing, book stores, coffee, etc) restaurants, bars, and historical attractions, as well as the Bosphorus itself. Anything of interest can be reached within a 5-20 minute walk, and it's also close to the tram, metro, and a variety of buses, if you want to go further out.
The hosts themselves were friendly and very accommodating. They sent me a message on the date of my arrival to welcome me to the room, and were excellent and fast communicators for anything I needed. I ended up extending my stay because I had such a good experience here and would definitely recommend it for anyone visiting Istanbul!