We had a good time at Hikmet's apartment. He was easy to communicate with, responded promptly, was reliable and helpful. He helped arrange transport from and to the airport, which we recommend -- a bit more expensive than a taxi, but worth it, since taxi drivers may have difficulty finding the apartment.
The best aspect of the flat is its location -- minutes' walk from the main tourist attractions. In particular we recommend the Sokullu mosque which is just across the street -- quiet and beautiful.
The apartment is spacious and comfortable, but perhaps not quite as flash as the pictures show. For example, at some point the electric sockets are pulled from the wall. It's an older building and so sound-proofing is basic, and some neighbours were noisy. The mattresses were really nice and comfortable. The kitchen was useful, the dishwasher a definite plus.
Overall, for the price and location, this is good value.