Pros
Beautiful building, beautiful people. Times Square is an amazing location, and I've always been proud to work there. You will meet some interesting personalities at Conde Nast, and of course there are the free clothes and makeup. I should also add that despite Conde Nast's reputation as a cut-throat place, it's also pretty accepting in that there is no sexism, racism, or homophobia.
Cons
A lot of people are unhappy here. It's true. Whether they're dissatisfied with their salaries or the fashion/publishing industry as a whole (or perhaps it's the fact that even senior level people work more than 8 hours a day), people do not seem happy to be working at Conde Nast, even though theoretically it should be everyone's dream company. People cry, snap at each other, get sacked, send passive aggressive emails.