Disappointing - avoid if you can.
Spent a few nights here recently and frankly was disappointed. Have stayed in a number of Hilton hotels ( San Diego, Canary Wharf, Egypt etc) and this one doesn't compare. The locality is great- close to all the main sites, but so are a lot of other hotels in NY. 
The decor is tired, but that's OK. When we arrived the room didn't seem prepared- we had booked 3 guests, but there were only refreshment, towels and toiletries for 2! In fact, it took 3 calls to reception to get some hangers and coffee whitener ( apparently they don't provide milk!) On e evening we asked for a jug of milk and they charged us nearly £10 for the porter to bring a glass of milk!! Also, we asked if there was an info pack with breakfast times etc as we didn't have one in our room and were told it wasn't the Hilton's policy to provide info packs and we could find it online?! 
The service we received was variable. Most of the staff were helpful and polite- notably the concierge, the security staff and chambermaids. Unfortunately the staff on reception were rude and for the most part unhelpful-everything was just too much trouble and clearly they don't enjoy their job ( well maybe they are in the wrong job!).
All in all the stay was just ok. We spent most of our time out and about and ate out every day, so we only really slept there and used the wifi. For that it was expensive and I wouldn't stay again.
I read reviews of this hotel before travelling and read similiar reviews to mine- I should have listened. My advice- shop around and you'll find better.