We have been to Istanbul now 5 times. This apartment is extremely comfortable. It is an AirBnB so it's not fancy by any means. The space is fantastic though. There are windows all the way across the living/dining area. The view is 50% obstructed but for the 50% that is not, the view is spectacular. You can clearly see the Grand Mosque, one of the bridges to the Asian side of the city, which is lit up at night, and Dolmabahçe Palace. The hosts are very responsive - but seem to only respond to text messages through the AirBnB link. They got back to us usually within 5 to 10 minutes.
Overall we had a really good experience with the unit and the management company.