I did the essay, using the picture of the zipper. Tried to relate the image to combining similar but different areas of public policy in order find well-informed solutions. It's kinda vague, but fits in with their "answers are at the intersection" mantra and interdisciplinary approach, which I honed in on during all of my essays. I think the essay could only help the application and don't think a weak one would set anyone back.
I feel for all the people trying to move into NYC from out of town. It's a big move and it's expensive here. Personally, I live in Jersey City and my commute won't be that bad, but I'll have to leave early from my job (also in Jersey) to drive to the PATH. Luckily they're cool with it, but I think it'll be tiring after the first semester. I'm gonna try to transfer my work life and real life over to NYC to match my student life after a few months. Of course, this all depends on NYU helping out with some financial aid. Definitely can't fund it on a government worker's salary, and I'm not sure how high I am on $80,000 in loans. Guess we'll all know our situations soon.
For folks moving in, you can find a place outside of Manhattan (on both the Jersey and Brooklyn/Queens side) with a half hour communte to NYU for under $800, including utilities. But you'll have a roommate or two... or three. I first moved to the area to take a job and didn't know anyone, and I found a good apartment on Craigslsit: one roommate and $600 flat. You can live comfortably on $1600 a month, or scrape by on $1000, as long as you don't have any debt to worry about. Plus I'm sure the NYU advising staff are seasoned at answering any questions about money and housing.
So be prepared for some sticker shock if you're from outside the area (unless you're from L.A. -- prices are comparable). But once you're here you'll get used to it and adjust. I know I did.