This is a really charming, characteristic home. Some of the rooms are a little dark, but that is because it’s an old building in an old street! It’s true there are lots of little steps up and down inside the house. This is part of it’s character, but if like me you’re short-sighted, you might trip a couple of times when not wearing your glasses! The area is great with lots of shops and bars and small supermarkets.
The kitchen needs a couple more utensils for cooking - like a chopping board. But there was enough stuff to manage. We stayed at the end of July and never missed having air conditioning. The flat is on the 4th floor so if you open all the windows you get a great breeze!
You do need to be quite fit to get up the stairs with suitcases. It wasn’t a problem for us, but might be for some people.
On the whole I would definitely recommend this place as it gives you a real old Istanbul experience.