I recently stayed here. I was pretty disappointed, especially since I've had exceptional experiences at the J.W. Marriott hotels in Hong Kong, London and Dubai.
While I was upgraded, the room was fairly tired. It needed a good renovation -- there weren't enough outlets for devices, as an example. My in-room espresso machine didn't work well and the capsules weren't labeled so you had no idea what you were getting.
Bathrobes were provided, but slippers weren't. No mouthwash or dental kit was provided, which was a first for me at a J.W. Marriott hotel. Basic requests like delivery a package or bringing slippers took nearly an hour to fulfill. I never received a newspaper, but neighbors did.
The 36th floor lounge was kind of disappointing, especially since Pepsi and Diet Pepsi cans were locked away during the day. The food was the same that you'd find at a Marriott in Sioux Falls or wherever, not an upscale J.W. Marriott. The lounge didn't even have 1% milk, let alone skim milk.
The pool is nice but gets almost no sun. It should have been located on a higher floor.