Güner and Güven are two friendly and uncomplicated guys. They always response very quickly. Moreover, Güven has been reacting promptly as I told him that the internet and the tv didn't work.
The apartment I had is like I expected: a tiny little one, clean and perfectly located (Beyoglu is perfect for your visit in Istanbul). Next to it you'll find a little food store which is open 24/7. That's comfortable but therefor it is also a little noisy during the night because of the costumer (it seemed to me like it is also a meeting point for locals).
I would have appreciated if the host filled the refrigerator with a little water or decorated the room with a flower or so. That would have made it more "feeling at home".
Generally, I'm glad that I stayed at Güner's and can recommend the apartment. Thank you guys.