Good quality versus price ratio. I found the room fairly comfortable and the overall apartment was nice and well maintained.
The neighborhood is very central, a short walk from Taksim square. So from there it's pretty easy to get to most places in the city. Though it's somewhat gritty, so be prepared for that. Especially if you're a female travelling alone.
One issue I had was that the wifi is very spotty and sometimes didn't work at all, which was frustrating at times.