My spouse and I stayed at Murat's place for 11 days in the Smart Room for 2 and his parents and sister stayed in the With Garden Room 2.
Good - Price, Location, Hosts, Terrace
An affordable option, the building is in the Fatih district, at a walkable distance from everything Sultanahmet has to offer. Also nearby are other transportation perks (bus and tram) as well as conveniences like markets, restaurants and a tea garden. The hosts are great. We got in touch with Murat and Edip, and they let us check-in earlier than the published time (and offered to keep our bags if the rooms weren't available). Edip also offered us a quick walking tour to get our bearings on the first day and was always available to ask questions. They also were flexible with our check-out so we could leave later than the published time (miscommunication between hosts took away from that opportunity). There is a terrace on the top floor with tables, chairs, couches and a little kitchen. Great for when we wanted to hang out as a family out of the rooms.
Bad - Mold, Cleanliness, Noise, Communication
The bathroom ceiling in the Smart Room is covered in mold and you can smell it in the air both in there and in the bedroom. The bathroom wasn't properly cleaned when we got the room so I got my own supplies to make sure it was disinfected. Both rooms have noise issues. The Smart Room is on the main floor so you'll hear it every time someone enters or leaves the building. The Garden room's issue was being able to hear everything happening in the room nextdoor. Communication seemed to present itself as an issue at the start and end of our stay. The room we booked for my in-laws wasn't available upon their arrival (despite the reservation we made) so they were put into another room before being moved into their reserved room the following day. The 2nd issue was on our last day. I had arranged with the owner to stay until 1600. I left for the morning while my partner was in the room and was told to vacate as the next guests were at the airport. Upon my arrival, he and all of our belongings were up in the terrace. Once I brought it up, we were given another room to finish our packing.
Overall, the mold is a deal-breaker for me. If you're looking to spend a few nights and the above points aren't an issue for you though, then it's a catch.