We reserved and prepaid a non-smoking room but were given a smoking room because "the hotel was full". We were transferred to a non-smoking room the next morning but there was cigarette smoke coming in through the AC vent. It took 2 room changes to finally get a smoke-free room.
Except for the doormen who are very polite and helpful, most other staff are impolite. The worst is room service, who come in with an attitude, require immediate payment, then look visibly angry when they realize they have to make another trip to bring the visa terminal.
The worst thing about this property is that all staff will knock on the door twice then immediately enter the room with their pass, which constitutes an invasion of privacy that is unfound in any other hotel I have ever stayed at. Let alone a 5-star Hilton.
Another disappointment was the impossibility to take a private Turkish bath.
We will never stay at a DoubleTree again.