I interviewed through an on campus recruitment event. Many people from my university got initial behavioral interview on campus, and was promised an interview on site. The entire process was very unorganized. Many were never brought down for an interview, and of those that did, only one actually heard anything back even after emails asking for updates. I did get called down to participate in a group interview, but it wasn't until after the second day that they told me that it was an accident that I was brought down for the group session since I was a PhD chemist and needed to do a presentation of my research. We were also supposed to be reimbursed for the mileage and cost of going down there. They payed for the flight, but I have never received reimbursement for the mileage driving around and taxi services. Overall it was a complete waste of time.