Like everyone else I must say the location is great. You really are just steps away from food, coffee shops, nightlife. And just a few minutes walk to Galata port, Galata tower, and the ferry. Between hotels and airbnbs this is my 3rd location I've stayed in while in Istanbul and it by far my favorite area of town. And as a solo female traveler I absolutely felt safe walking around late at night.
The apartment is 2 flights up a narrow spiral staircase, with no railing and narrow footwells, and may not be ideal for people with large or heavy luggage or people with mobility constraints.
The apt also faces the street and can be quite noisy with the hustle and bustle of the neighborhood. I'm a city girl so I can sleep through just about anything but I thought it was worth mentioning.
And thank you to the host Zain who was easy to communicate with and made a same day booking really easy. Self-check in was clear and simple. The wifi was good and the AC was much needed in the summer heat.