I had my interview last week. It was an individual open-file interview with 2 professors and fairly formal (a lot more so than PCO, from what the other interviewees said). They asked the standard questions, about some research I had done previously, and what I do in my free time. The other people got some current event questions during their interviews. There's also a short essay (1 page, 20 min).
I don't think you need a 350 OAT. SUNY's stats sheet says last year's class avg for Total Sciences was 336, so I wouldn't stress too much about it.
I would say to bring your transcripts, though. Somehow my officials were lost (probably in another applicant file), so I had to give them copies of the ones I brought.
All in all, a pretty relaxed day: essay, interview, financial counseling, tour, lunch with a student. We didn't get to meet with Dr. Johnston because he was out of town, but I guess he usually meets with the applicants after lunch. It was good for me, though, because I walked up to the Gershwin Theater and got a cancellation seat (row G!) for the matinee of Wicked.
Lots of luck! I really liked the school and the faculty we met, and you can't beat the location.
- p.dot