Selim's place is at a perfect location, very easy to get around with public transportation and walking distance to lots of tourist points like Sultanahmet, Great Bazaar, Agya Sofia, Suleymaniye, etc. There are also awesome restaurants nearby with affordable prices.
The place itself is decent and has everything you need. If something is missing, just contact Selim and he will happily get you anything you need. He was very helpful since the beginning, available at all times whenever I had any questions.
The apartment needs some renovation, which was mentioned by host himself, he also said that he is working on it. But this place is exceptional because of its location and its great host, the rest is manageable :)
We stayed there for 4 days with a big family (5 adults, 2 kids). It is perfectly suitable for that amount of people. Since the check-out is at 11 and our flight was in the evening, we kindly asked Selim to let us leave our luggage there until 4pm. He said that since there is no one else coming that day, we can stay there as long as we want. He even said, that we can spend another night on the house, haha.
So overall - 5star location, 5+++ star service.
Totally recommend it!