The hidden value with this stay is the host. I recommend you contact him early for assistance with your stay in Istanbul. For example, I tried to take a taxi from the airport to the apartment and was hassled by the taxi company and had to argue with the manager. The taxi wanted to charge 500 lira for a 45 minute ride. After our stay, Embrah returned us to the airport for 200 lira. Emrah can help with other tour plans you may have. And he speaks English. this is rare in Turkey.