Nice place, great location and great value for money. It is a basement flat so there isn't much light apart from a small bathroom window, plus it's very small. But this didn't bother me because of the great location, you've got basically unlimited places to eat right on your doorstep, plus right near Taksim square and Metro to get around. Plus it's very warm and cosy even in winter.
It's a great value place to stay, plus there is a gas cooker to make your own food if you want, plus a small TV and good working Wi-Fi. Loads of laundrettes nearby as well to get your clothes washed. I enjoyed my stay there and I'm actually returning soon because of the great location and good value for money.
Would recommend!