This is a lovely apartment in a vibrant neighborhood. The description on the airbnb website was accurate, and communication with the host Melis was excellent.
Everything you need is within a short walk. For transportation, Osmanbey metro station is a few minutes walk, as is the bus 30A at Nişantaşi.
Recommended places in the neighbourhood are La Vita pattiserie, and the restaurant ÇATÇAT Nişantaşı.