It was a truly amazing experience!
1. WiFi was perfect (50Mb+) and it was important for me because I had to work
2. Location was great! (5 mins walk to Suleymanie Mosque which is probably the most beautiful one in Istandbul). Grand Bazar was 10 mins walk, 20 mins to Ayasofia etc. Also 2 mins to Metro station helped a lot.
3. Amount of places to eat out nearby was descent with good food options.
4. The place was very clean and nice with all you need (washing machine, kitchenware etc.)
5. Host was amazing - easy check-in/check-out, responded in minutes whenever we needed something and didn't disturb us at all :)
The only issue we had (and it was not a surprise because it clearly says it's traditional wooden house) is noise from the street. Living in a wooden house - you can hear the noise around unfortunately. It was not a big problem for us but for people who want to have a calm stay - it's probably better to find something different and probably even move from Old City area (c'mon, you are in the city center - of course it will be noisy).
Thanks a lot for a truly great stay!