I was interviewed and subsequently wait listed last year. The interview process lasted about 4 hours in total but a lot of that was just waiting around. There were about 30 of us so the interviews were staggered based on who your interviewer was. Each interview consisted of an OT faculty member accompanied by another health sciences faculty member. The questions are exactly what you would expect, why SBU, why OT etc. My first interview went very according to schedule and was strictly led by a series of questions they had on a paper...they basically were firing off questions one by one. My second interview was much more organic and fluid. As soon as your interviews were done it was over. It was mostly just waiting before and in between. There were a few students who came in to talk to us about the program and the curriculum which was nice. You were also given a sample schedule and other reading materials as well as a sheet of paper identifying any outstanding materials you needed to submit.
The interview request for this year was a little different than last year in that it says there is only 1 interview. The email from last year specifically said there were 2 so maybe they changed that.