Me and my mom stayed in Murats apartment for about one week in October. It was all in all good, even if we had some difficulties with the cleanliness and some things, which needed fixing. Together with our host we could find a solution, which worked for all of us. We really liked the very warm water in the shower - it was a little chilly in Istanbul these days. There is also a well-equipped kitchen which you may use if you are tired from various street food (there tons of locations close by). The apartment is on a hill, so you would need to climb stairs, which for us was absolutely fine. It is only few streets away from the busy bar and restaurant area, so you won’t have this kind of noise. For me the street was still quite loud and noisy because of many cars passing on a low gear and many motorbikes. But I guess this is reality in almost every central area of Istanbul, because of it's crazy traffic :-). Inside the apartment you will find some old furniture, which is on one hand sustainable, on the other hand some things are not very stable and you have to handle them carefully.
The communication this Murat went well, he answers quickly and is very friendly.