I stayed with a friend of mine in this place and we enjoyed being there.
We didnt meet Coskun in person but he was very fast in responding. Otta the guy at the reception was extremely nice and helpful and tried his best to make us feel comfortable. The room is spacious for two persons and is very clean. It was cleaned every day which is a very nice scene to come into after a very long walk in the busy Istanbul.
checking in and out was very easy and flexible.
About breakfast I see some people say it is very good, but I must say it was not that special.