We absolutely loved our stay at Secil's place. Her apartment is in a really nice location in Feriköy which is about 12 minutes walk to Osmanbey metro station. Secil was very responsive and was always quick to answer any questions we might have e.g. the best places to get a coffee and where to find a tailor.
The area of Ferikoy is close to a lot of shops, restaurants, cafes and bakeries and is a great base from which to explore Istanbul.
Her apartment is extremely well equipped and has everything you need for a long stay - the kitchen is particularly fantastic as it has an oven (a rarity in Istanbul it seems). We cooked at home on several occasions during our stay and it was nice to have this option. Secil is also a keen baker and has everything you need to bake to your hearts content.
We both work from home and found the WIFI to be super fast which was great.
The whole place was cleaned to a high standard. The apartment itself is really spacious (even bigger than the photos suggest).
We didn't get to meet Secil during our stay but hopefully we will be able to do this the next time we are in Istanbul. We loved Secil's place and would gladly stay again!