Hatice’s Sapphire apartment has a very nice view, but as she will tell you it is quite a climb (5 flights up a circular stair). If you want a nice view of the Golden Horn and can manage the stairs (I didn’t find them that hard), this is a great choice. The location is not in Karaköy, though, as best I can tell. It is off of Akarca Sokaka near Kasımpaşa Çok Programlı Lisesi (a school). The view, as shown in the pictures, is very nice, with a good view of Süleymaniye Mosque, and you can see the children playing during school breaks (and hear them if the windows are open). The apartment is not in a major tourist area, so it is a moderate walk to Galata, Karaköy, or Istiklal Caddesi. When going there, be sure to find a taxi driver with a phone. The first driver we flagged down could not find the apartment and eventually gave up (our worst experience with a taxi in Istanbul), and the second had to call Hatice twice to find it. Although it is not in the touristy areas, it is probably among the bargain views for the Golden Horn. I suspect apartments in Karaköy or Chihangir are substantially more expensive for comparable altitude and view. There was an unpleasant odor from the bathroom (shower area), so be sure to keep the vent shaft window open and the bathroom door closed (it was a bit of a challenge to latch when we were there). We also had an issue with one of the chairs that prior guests apparently did not inform Hatice about (sigh), so we were not able to use the table for dinner the first night (we cooked for ourselves about half the time), but she had a folding chair brought by the following morning. Hatice’s café is downstairs, and she will welcome you to visit with her there. She is interesting to talk to, with a varied background and quite the entrepreneurial spark. If you want a broad view of the Golden Horn and don’t mind being a bit off the beaten path (and are willing to climb five floors of stairs), this is the place for you.