Ayla's place is great, and she's a lovely person, nothing is too much trouble. The studio is at the top of the building, but worth the climb for the beautiful view from the terrace. There is everything you need for a perfect stay, it's nicely furnished and the WiFi is great.
The area: the metro is two minutes away, and it's just a short walk to the Galata Tower and the famous Istiklal Avenue. A beautiful part of Istanbul.