I applied through my university's career website and talked with the firm at an accounting specific career fair put on by Beta Alpha Psi. I got invited for an on campus interview shortly thereafter.
Their application is incredibly long and is meant for a full-time hire, which is annoying if you're applying for an internship.
The interview was essentially what I expected. A normal face-to-face with two reps from the Cedar Rapids office. However, it was the shortest interview I've ever had. It was only about 20 minutes total. At first I thought it was because I tanked it, but after talking with others they had the same experience.
Unlike other professional interviews it was just them filling out a form with my responses to their questions. They never maintained eye contact and didn't seem interested in what I had to say.