Not the hotel it used to be
We had stayed at the Hudson eight years ago and had a nice stay. It was a hip and happening place, very clean and shiny. Time has not been good to the Hudson, despite their trumpeted renovation, the formerly cool lobby is now dim and dusty looking, the ivy clad walls and ceiling now look weedy and grey. 
From the, still fun, lounge on the 15th floor you can look down into the atrium and see all kinds of junk on top of green tarps that protect the glass of the lobby. This includes a full sheet of drywall which probably would have crashed through the glass into the lobby without the tarps. This made me nervous each time I passed through the lobby afterwards.
Our room smelled of cigarette smoke when we arrived and our comment to the very attentive bellman brought an ionizer to remove the smoke smell. This was supposed to take one hour to work, but when we returned from a two hour walk - you can't be in the room when the ionizer is going, so we had to leave- it was still there and it took 30 minutes to find someone who ask to have it removed. We spoke to four management staff before or trusty bellman, Ben, happened by and took action. During our forced 150 minute forced exile from our room we were never offered a complimentary drink or anything else for the inconvenience.
I really want to like the Hudson because we had good memories, but it's come down so far that I can't recommend it. It hip small room just seemed dingy and uncomfortable now. The air conditioner cycled on and off loudly all night - there was no setting for the fan to continue running when the A/C had reached temperature - and the cold air blew right onto your head in bed. 
You can't sit straight on the toilet, in fact I can't believe it meets the code for a bathroom. Our shower drain was plugged and nasty stuff came bubbling up when my wife took a shower.
All in all, not a pleasant stay made worse by poor management. Although, I have to applaud our two bellmen, Frank and Ben, who tried to make the stay as pleasant as possible.
There are a lot of choices in NYC, stay somewhere else.