I stayed at the apartment for 2 weeks with family. It was a perfect, cozy setup. The space is very clean, quiet, stylish, peaceful, and thoughtfully laid out with just about everything you'd need arranged in a very efficient way that feels comfortable. The cute kitchen area is amenable for cooking simple meals and there are essential staples.
Ahmet is a very frendly host, who is taking care and help by all questions. If apartment is free for the days you are going to Istanbul, you can book it without any doubts - you will for sure be satisfied!