I have had many people staying in my apartment, thus I am a quite experienced host.
Great place! Lovely and very spacious (especially for a European apartment), the host is very responsive to questions, and making sightseeing suggestions. Nice touch that they provided us with an english language "Time Out Istanbul" magazine which had listings of many of the current events. The building also has a "super" (who seems to be on-site all the time) which is an added bonus; he helped us get more water for the apartment, took the keys at the end of the visit, etc..