Sadly Unsanitary
I arrived late in the evening (April 12, 2012), dropped off my bags, left the hotel for a dinner party and was so exhausted when I returned to my room I crawled in bed without turning on the lights to notice the disgusting stains of dry, yellow-ish, crusty, human matter (I can only imagine either semen or otherwise) on the top of my duvet cover!
In the morning, I woke up and immediately called the housekeeper, who arrived with her manager and apologized, saying it was the “laundry services fault”. It took housekeeping almost TWO hours to change the duvet (and subsequently the stained comforter underneath) and when I asked the housekeeping manager if I needed to speak to the hotel manager to be moved or credited for the night for my inconvenience (and two hours of my time with my friends waiting with me) she stated she would “take care of it”. 
Needless to say, they sent me an apology note with wine and strawberries (I don't drink), I was charged full price for the room (~$350/per night), and subsequently have been told by my doctor that I was bitten by bed bugs while I was there and have had to sanitize all of my belongs from my stay at the Westin at Time Square. 
I have since contacted the hotel, and after exchanging FIVE phone calls with the “billing department”, who told me “that it was MY fault that I didn’t immediately speak to the hotel manager instead of the housekeeping manager who said she would take care of it” and being offered “100 Starwood points”, I was finally credited for one night (thus, poor instead of terrible)! 
Bottom-line, I stayed in a filthy hotel room, returned home with bed bug bites on my arms, was treated disrespectfully by the staff (even after my stay), and am warning others to not jeopardize their health by staying at this hotel (even if the location is wonderful). 
I am a Starwood Gold Member and expect so much more from the Westin brand…especially in NYC!