It was a pleasure staying at Hakan's apartment. He was very hospitable, made some sightseeing suggestions, and we even got to have a few good conversations. The apartment was very tidy and was located in a convenient yet quiet area of Besiktas. Hakan provided some maps that were useful in figuring out certain destinations and means of transportation. Hopefully I'll be able to visit Istanbul again in the near future. If so, I would certainly not hesitate to stay at Hakan's again.