Overall a good experience
I agree with most of the reviews of the W New York - Downtown: it's a great hotel, very clean, with an amazing view of Ground Zero and the 9/11 Memorial. On the positive side, rooms have a nice decor, mini-bar is well stocked and everything seems to be well kept. Definitely a 4-star experience. On the negative side, the lobby mobile DJ/club "thing" is indeed a bit annoying, especially if you have to make your way through the crown to the elevator with luggage. Additionally, I was just a few floors above the lobby level and was able to hear the sound coming from the dance floor. I didn't really care about it, but it might be a good idea to ask for a room in a higher floor so to avoid trouble. Overall a good experience, would definitely do again.