It is a new apartment. However, the building is located in a location which is hard to access the places you need to go. The other problem you could face as a visiter is that most drivers are bad: they don't respect you as a foreigner. In addition, they don't speak English or any other languages except Turkish. And most drivers try to charge you more than they charge the normal people. They drive in a very reckless and dangerous way. Some of them even try to smoke while you are in their cars. I never expected to meet this kind of people in Istanbul.