Very average experience
My wife and I just stayed at the Gansevoort Park avenue for 5 nights - just to preface this review, we have stayed at very high end resorts/hotels all over the world including LA, Las Vegas, Europe, etc...here are our thoughts.
Pros:
1. Very good location - there is a starbucks and bread & butter nearby for breakfast. Very central location to most places in NYC.
2. Good size room - we were pleased with the size of the room and bathroom
3. Gave late checkout until 12:30pm on day of our departure
4. Nightclub upstairs - we checked this out on the Fri night - nice venue although it served overpriced drinks and was quite crowded (but nice to have this nonetheless).
Cons:
1. We were never told that the hotel adds a $150/night charge for incidentals - my credit card company saw this as a 'strange' charge and cancelled my card. So for my entire trip I had no credit card - I really wish the hotel had told me about this when I was initialing my invoice so I could have called my credit card company and told them about this extra charge. 
2. Bathroom - the shampoo and conditioner sucked. For a high end hotel, it was quite pathetic. Also the toilet paper kept flying off the stand when trying to use it. Very frustrating. The shower had this weird green stain on it (still not sure what this was). 
3. Bar/Club - drinks waay overpriced - we paid over $30 for 2 vodka/cranberry's. Very crowded too - not somewhere I would return to be honest. 
Overall I found this to be an average experience. I think the location of this place is probably its best feature. For the amount of money that we paid, I have experienced much better hotels.