Definitely ask for an upgrade on upper floors! The front desk put me on the 29th floor (the rooftop lounge is on 31st) and it was such a clean/crisp room. Loved all the lighting and cleanliness of the place. Hotel guests can use the rooftop without any reservation btw 9am-3pm and it's so nice to drink coffee and soak in some sun in the morning. Anytime after 4pm you have to put in reservation for the rooftop lounge like everyone else. The elevator might be a bit hectic depending on what time of the day due to guests coming in for the rooftop, otherwise the amenities are wonderful and I would come back here again.