We loved it! Altuğ is an absolutely friendly and helpful host who made our stay super comfortable. The location is great, layout of the flat is perfect for 1 or even two couples. The terrace is marvelous! There are some stairs in the area but in general Istanbul seemed a bit hilly , so it’s not that kind of disadvantage I would associate with the flat. In general, if you are going to Istanbul with an older person, be prepared for some physical challenge.
All in all, the apartment is cozy, well-located, quiet - I would highly recommend it!