We had a good experience staying at Tansel's place. It is in walking distance to sights like Blue mosque, Topkapi palace, Hagia sofia. The apartment itself was very comfortable. The bed was very neat and comfy. The apartment is also well equipped for a traveler. Tansel had left a cell phone for local use which was very handy to be in touch with him. There was also a tablet that we could use. We arrived quite late in the night and didn't have water and in Turkey it's not recommended to drink water from the tap/faucet. Tansel was kind enough to get us two bottles of water. The only thing I would point out is that the bathroom didn't havea door, so that was a bit odd. If you're a single person, doesn't matter then. Tansel mentioned that they were going to fix that. Once that's done, everything's perfect.
Overall it was a pleasant stay. I would recommend this place.