I stayed in Umit's apartment for 2 weeks. The apartment came with all the essentials such as toiletries, towels, kitchenware, bed linens, etc. The location was awesome, away from the city traffic in a beautiful neighbourhood, but not too far that it would make travelling difficult. Subway, restaurants and groceries were all within walking distance.
The place itself was even better than the pictures in the ad. The apartment was high up with an amazing view and a spacious balcony. The host was easily reachable and quick to respond whenever I needed something.
I definitely recommend this apartment and will book again if I ever travel to Istanbul.