It was one of my best Airbnb experiences. Akif is a great host. He has a great list of recommendations for places all around Istanbul. It was a big help that he met me on the street when I arrived, because my phone died and I was running late.
Location of the place is perfect. It's close to the metro station, which is three stops away from Taksim square, where buses from the airport arrive. Also, it is right between Balat and Sultan Akhmet areas. And it is a minute walk from Valenta Aqueduct, which looks amazing, especially at night.
Heating and hot water works perfectly. Terrace has an amazing view, big couch, and a table set. You can have your bbq there (I saw all the supplies for it, but didn't have time to use them).
The greatest thing was a set of local food that was in the fridge (eggs, olives, cheeses, drinks, etc.). That was very helpful after a long flight.
Under the apartment you have a local market with local goods, cafes, restaurants and grocery stores.
Beds are very comfortable. Apartment has all you need for a comfortable stay: washing and drying machine, coffee maker (Turkish and filter), hairdryer, iron, vacuum cleaner, many towels, washing soap, shampoo, shower gels and creams.
Akif's place is going to be my #1 choice for my next Istanbul visit.