I interviewed in April and overall, it was pretty laid back. I had two interviews - one with a student, and another with faculty members. The student interview was really chill - she just asked me where I'm from, where I went to college, what my interests were, etc. On the other hand, the faculty interview was a bit more intense. They asked me particular things from my personal statement and application. I was asked about my academic ability, leadership roles, shadowing experiences etc. Basically, if you're genuine and you know what you talked about in your application, you should be fine. Be able to elaborate on every aspect of your application because they might just ask about it.