The location is good, the building is safe (I forgot my tuxedo and was able to get it back after a week from my stay). The building is new and clean. The staff is nice.
However, there is no included housekeeping. There is no person overnight to help if something goes wrong. We checked in late in the evening and the air conditioner was broken. The security person advised us to deal with this until the team comes in the morning at 9 am. The weather in Istanbul is usually good, but that night in mid-July was like hell, hot and humid.
Otherwise, we enjoyed our stay!