Excellent location
We stayed in room 411 which is along side the outside of the building with a narrow street outside. The street noise was audible but not a problem at all and did not disturb sleep. The garbage men come at 6:30 am and make a noise but it is only for 10 mins at most. 
The room was very trendy with an exposed brick wall and a lovely big bed. We had a TV and dressing table. The bath room was not large but everything was clean and worked properly. The bed was very comfortable and the room was nice and dark.
There was an evening event going on down stairs but we could not hear it at all in our room.
The breakfast is thrown in free of charge as it's more of an afterthought. Saying that it had everything you need for a continental breakfast with tea and coffee available.
I would recommend it as it is only 3 mins walk to union sq but nice and quiet. I would stay there again on my next visit. We booked through bookings.com and got a good deal. The staff are extremely helpful and knowledgable too.