Andrew and Kardelen's apartment is in a fantastic location. It is sparkling clean and well equipped for a comfortable stay. I stayed for a month and worked remotely. The wifi worked perfectly and I was able to work easily without any interruptions.
Simen was also wonderful. She met us at the apartment and checked us in quickly and when we had questions or request her response was immediate. If you are planning your first trip to Istanbul and are considering an apartment on the European side versus this apartment I strongly recommending renting this one. You will not reqret it.