I found Eyp's apartment perfect for a stay in Istanbul.
Starting with the location (is my second time staying in Beyoglu, and I still think is the optimal neighbourhood for tourists), the street is quiet and nice.
The apartment itself is nice and comfortable. Good size (we were three and felt comfortable), comfortable, with some beautiful Turkish details (the reading corner was my favourite place to finish the day with the book). We haven't cooked, so cannot say much here, but it seems to have the basics that would be needed.
Another advantage is sauna+hammam in the building next door. I still recommend to visit the traditional hammam with scrubbing but also not to miss this one to feel like local :).
Good experience, smooth communication and check-in/check-out process.