Very nice apartment in one of the best locations. Short walks to most of the happening places such as Taksim, Galata, Bridge, etc. It is equipped with most things you need for a short stay. I would reccomend it.
Altho the apartment is located below the ground floor. it could feel a bit smuttered. However, the apartment has large windows at the back to get the sunlight and fresh air (at the expense of less privacy from the nearby and opposite buildings)