My husband and I came to Istanbul for 1.5 weeks for work and wanted somewhere spacious as our base.
The view was great, we could watch the city go by night and day
Location was walking distance to some of the best restaurants, and we caught the bus or tram into the old town to see the sights
Plenty of supermarkets around and we used the kitchen a lot, which was functional
The place was warm and there was extra heating if we wanted it
You could open both sides of the windows to get fresh air through if required
The wifi was strong and tv was great
Host was responsive and was very helpful with other requests too for business
We would definitely stay here again when back in Istanbul