I did recently. (R1 applicant here).
Modern building, nice campus. Very nice students and alumni - friendly and collaborative as per the reputation.
Questions were pretty standard. (Why MBA, Why Cornell). Some were "behavioral" (What would you do X, or Tell us about a time when... ). Mostly standard stuff. Just be sure you know why you want to attend Cornell, and why you want an MBA, and be yourself.
Lasted about half an hour for their questions.