Four New Yorkers visit Times Square...
If you want to be in the middle of Times Square, this is offers an excellent location. Please be aware though that Times Square is NOT necessarily the best location to visit NYC. It is claustrophobia-inducing and feels like Disney World. I digress.
I thought the Doubletree was great. The rooms were clean. The decor was nothing fancy and the view was sort of blah. I was surprised by the size of the rooms (I thought they would be a bit larger) but for NYC they were fine. We had a standard king room and fit three adults and one teenager comfortably. I booked the stay using hhonors points, and as a Diamond member, I was entitled to a space available upgrade. There was no mention of this at check-in, so I assumed there was nothing available. When I checked on the website and saw plenty of better rooms I called the desk and was told they were sold out. I didn't argue, as our room was comfortable enough. 
The breakfast was standard Hilton eggs/bacon/pastries. They had soy milk for my coffee! 
Location is the main selling point here. We walked to Terminal 5 for two concerts- it was about a twenty minute walk. I felt that this hotel was a good use for my hhonors points.