The place has all you need and feels new, and you won't find a nicer and more accommodating host than Ergun. He's great. The apartment is in a lively part of Istanbul, just off Istiklal Street, so you'll be able to get around easily and enjoy the nightlife. The other side of that coin is that it can be quite loud around the area well into the night, despite the apartment being on a back street and on the 5th floor. So bring earplugs/headphones. Enjoy Istanbul and eat the stuffed mussels that are sold on every other corner along Istiklal -- they're worth the trip alone.