100% recommend this apartment. I spent a week in Istanbul at Pelin's place, and then a couple days in other locations, and this is by far the best neighbourhood to be in.
The apartment is very well located, it's a perfect size for a couple or solo traveller ( bedroom, living room and kitchen), and very quiet at night.
There are great restaurants around the corner, and everything is either a 15 minute walk away, or the historical locations are a 15 minute Uber/train ride away.
Pelin is a great host, very responsive and helpful.
If you are coming to Istanbul, this place can't be beat. Honestly, highly highly recommended.