I stayed for four nights and I’m pretty happy with my experience. If you, like me, are a heavy sleeper, this place works just fine. As other guests mentioned, the street below is pretty noisy until around 1 am. I’d also advise keeping the windows open to keep fresh air circulating. Other than that, it’s a spacious apartment close to a ton of great restaurants, the metro, ATMs, etc. A great home base for exploring Istanbul.