As Draco said, the interview was pleasant. They put a lot of effort in reading your application in advance. I got quite a few well designed questions based on my essays and my experiences.
Otherwise, I liked the admission staff (Dr. Mejia especially) and the students were nice. Not only did we get Jade, the president of the ADSA NYU Chapter (one of the most high energy 3rd year student) showing us around, but several students wished us good luck, made jokes, and during lunch some showed up at out table just to say hi and ask if we have questions.