Sadly this 5* hotel did not live up to it´s stars, nor to the grandeur of the hotel lobby.
Rooms and bathrooms are worn down, and in desperate need of a touch of magic, to bring them to a 5* experience.
Breakfast is cheap, however extremely boring too. Are you white European, waiters don´t pay attention you (we and others experienced this).
Cleaning of room had little effect, as hardly any was done. Room was dirty, trash did not get removed, and we had to ask for clean items in the room.
Location is probably one of the best in Istanbul - walking distance to everything.
All in all, we will never stay at this hotel again - as it simply did not live up to our expectations. And would recommend others to avoid this hotel in future too.