The apartment is in a great location. There's shops for everything you might need as soon as you walk out of the door. The Blue Mosque is a 3min walk away and the Grand Bazaar is a 15min walk away. Although we never met, the host seemed nice, and the check-in process was swift.
The apartment is on the 2nd floor and the stairs are quite steep to get there so be careful. In general, the place is old so the furniture and appliances were as well. This was precisely the reason we took the apartment as we wanted to get a feel for old Istanbul and it was a success. Rustic furniture was everywhere, the chandeliers, the lamps, the cupboards, the tables, the carpets, etc. The beddings were clean, and apartment was very spacious and comfortable. There were a few minor nuisances such as the wifi being slow, hot water temperature being hard to control, and the curtains and furniture having a bit of a musty smell. Overall, we had a good time staying here and would recommend it.