The apartment was everything as advertised. Clean, Simple, and adequate. Note the shower had particularly good pressure. All basic kitchen utensils and dishes were provided. The full-sized fridge is nice to store cold drinks and fruits. The terrace was a bonus if you like to sit outside and watch everyday local life pass by.
Wahid is a kind and accommodating host. I would agree and echo all the other comments regarding this.
Location is probably the most outstanding aspect. It is about 5min walk to the Blue Mosque. 10min from nearest tram station. 15min walk to Grand Bazaar. 20-30min walk to Galata bridge. Along the way are countless cafes, restaurants, small markets, and anything you can think of. Basically its in a near-perfect location for the Sultanahmet (historic old-city) area
One thing to keep in mind is the close proximity to a few mosques and their 5x per day prayers are cast on loudspeaker. I did not have any problem, but light sleepers should take note. Also, the whole Sultanahmet is cobblestoned and hilly, so be prepared to do a lot of uphill-downhill walking.