First the host is one of the nicest we have met in our travels. He goes above and beyond with checking in and being friendly.
The apartment he has decorated extremely well and done a very good job of this. The internet is probably the best and fastest I have experienced in Istanbul.
The location is good if you plan on being out late or want to roam the streets. Little quieter than moda proper but not by too much. I would caution if you want a quiet place this apartment does get a lot of noise from neighbors late into the night. While this place was not for us and we did leave early the host was very accommodating in changing the reservation to accommodate this.