We stayed 10 days. The location is excellent horizontally, a bit challenging vertically. I mean, it's within 15-20 minutes walk to all the major Sultanahmet sites or the Grand Bazaar, but everything is up a steep hill from here, and this unit is on the third floor (= 3.5 to 4th floor in the American system), so be sure you don't mind stairs and hills. Host Barbaros is responsive by phone/text, but is a hands-off host: We never met him. Check-in, requests for supplies, etc. were handled by his assistant, Anna, who is very helpful and friendly, although she does not speak English. There are a few minor repairs, mostly cosmetic, that would help polish the place up, but the kitchen is well-equipped and all the important things in the apartment worked properly (air con, shower, 3 of 4 burners on the stove, all the lights, etc.). Double-pane windows do a good job keeping out street and mosque sounds, and a nice new feature is a clothes washer right in the apartment. This was a good, comfortable base for our 10 days in Istanbul.