I got a first round which consisted of two 45 minute interviews, both of which had a case component. Both had similar formats: behavioral for 15 minutes, case for 20, then 10 for questions. The first interview had a much simpler, conceptual case in which I hardly wrote anything down. The second case was more complicated and I would say had a lot more asterisks associated with each step. Still a pretty simple case, even though I flopped it (my first case interview though). Study up on the company and make sure you know how credit card companies make money.