The accommodation is excellent for a larger group of people, it is spacious and has four rooms. I was afraid that it would be noisy because of the previous comments, but it was not a problem for us, walking around Istanbul tired us out so much that we slept like babies.
Internet is also excellent throughout the apartment.
In the period when we were there, it was a little colder and the heating did not warm the apartment very well, but we used extra blankets and it was ok. There is also a gas stove (boiler) in the small room, which often turns on and makes noise, so it can bother someone.
The cleanliness in the apartment could be better.
There was always hot water for showering for all of us seven, that's very good.
In general, the apartment is good and in a good location. You won't regret it if you choose it.