Me and my friend stayed here over our short trip to Istanbul. considering it was June, it was pretty hot in Istanbul already and the building has no air conditioning, but it is an old building so that is normal and it really isn't that bad.
The bedrooms are located away from the street, but its not that loud in that area in general because there's no main street nearby.
the apartment was very clean and cosy and just like it was described and shown in the pictures. If you don't like walking stairs you shouldn't book it, considering it is on the 4th floor, but we didn't mind and you had a very nice view from the small balcony.
A perfect spot for coffee in the morning!