I applied online through my school's job board and got an invitation for a phone interview. It lasted about 30 minutes and they told me that I would hear if I got to the next step in the process within a week. I received an email the following week inviting me to a "super day" in Philadelphia. They paid for all transportation, and in my group there were about 5-6 of us. First there was a short ice breaking session where we got a presentation on the company and then talked to past interns about their experiences and got to ask them questions. Then I had two back to back one-on-one interviews, and that was it. Everyone was very nice and seemed like they wanted to get to know you.