Jonas has a beautiful apartment. It is situated at the best spot if you want to discover Istanbul. The metro is very close by so you can go anywhere you want. ( 1 hour from the airport with the metro) Just a 20 min walk takes you to the old city.
Apartment is decorated very stylish, and you feel at home immediately. There are little shops close by if you want to buy groceries but lots of restaurants and bars around if you want to go out to a different place every night.
Jonas, although he was not in Turkey, responded quickly to my messages.
Do bring ear plugs if you are a light sleeper, cause there is some noice from the street in the morning.