I had a phone call interview first, then a group interview with a few of the directors from the department. Then my final interview was with the VP of the department. All of the interviews were casual and allowed me to feel very comfortable. This was great because I really wanted them to be able to see my personality and how I could be a great fit for the company. The panel interview was the most casual in terms of atmosphere, but the questions were very standard and they were reading from a sheet of paper. The interview with the VP was more of a conversational interview, which I really liked and it wallowed me to get a lot of information about the department.