I Arrived to Istanbul very late in the evening and had no issues whatsoever to check-in at the airbnb. The doubleroom I was staying in was clean. The hosts were super friendly who helped me when I had some questions or something I needed. The location of the place is like 5 minutes walking distance from Taksim Square and the bar street. You have almost everything u need outside by walking distance.
The area is safe. During night I never felt unsafe walking by myself but you should keep an eye on your surroundings as in every big city.
Would definitely stay here again and for its price and location its amazing. Highly recommend it!!