We had an amazing experience of staying at a top notch and modern apartment with great views in Istanbul.
The apartment is in a high rise building with a nice shopping mall on the ground/basement. Everything available in there. Mosque, train station, coffee shops, restaurants all at a walking distance.
Umut is a great host, very responsive communication with him who handed the keys/cards at our check in. He should be a super host and we will definitely stay again at Umuts place if/when we are back in Istanbul.