Rough Stay
I had a recent multi-night stay here at the Empire, my first stay at this property. A frequent mid-town Manhattan visitor, I often stay in a variety of properties, wherever my company places me. For the first night, I was placed in a smoking room, despite my request online for a non-smoking room. (Note: 4th floor is smoking floor.) I was told the hotel was sold out and I couldn't be moved until the next day. I left my bags packed and they reassigned me to another room the next day. 
Once I returned to my new room late the second evening, I discovered that the heater/AC was defective and would bang and clank whenever it was operating. I reported it to the front desk, but since it was after 11pm, I opted for them to send maintenance the next day and I unplugged the unit instead.
Returning to the room on the third night, I discovered that they hadn't sent maintenance during the day as promised and the problem persisted. Upon checkout, I complained and was offered a mere $75 credit for my troubles, even though my nightly rate was $300. I refused and got twice the initial credit, but was insulted. In fact, they said that they don't "guarantee" non-smoking rooms as requested, the first time I had heard that of any NYC property. 
Other notes: restaurant was good, rooftop bar has decent views, be wary of construction outside in the street. It starts early and is loud!
I will not be staying here again.