The apartment is on a good location, near Taksim Square and Airport Shuttle bus station (very convenient!).
The apartment looks better on the pictures, in real life it is a little run down (visible stains on ceiling, one window is not working, and others are hard to close when opened). Also the bathroom does get completely wet after use, and gets a certain smell from the evaporation and fan. There is no wardrobe (only a small rack for a few hanging items). Also the listing said that it had a safety-box, soap, shampoo, and there was non of the above. The kitchen is tiny and not useful if you plan on preparing meals.
The Check-in/Check-out process is great especially if you are arriving later in the evening. Also there is a washer and dryer in the hallway, as well as cleaning liquid which is convenient.
Overall, we were expecting more from the listing, it is at a higher price then some hotels, but it was a nice stay.