Onur was very responsive to messages and helpful with check-in. The place is spacious and well stocked (the kitchen in particular has everything you need for a long stay). The apartment is also very convenient to public transit - buses, ferries, and metro - to the sahil and to the shops etc in Kadıköy. The only real issue is that it is somewhat loud at night. This is not a huge problem most of the time, because it's ok with the windows closed, but on hot nights you have to choose between heat (windows closed) and noise (windows open). Otherwise, it was a nice place to stay for a few weeks.