I sat down with two different groups of managers with work they were doing. Nothing overwhelmingly difficult about any of the questions asked.
The frustrating part is that the manager I talked to on the phone was not in town for the scheduled interview. Additionally, none of the managers presented anything that I thought was really suitable for what I wanted to do. It was like they saw my resume and looked at their needs to pick my interviewers. It would have been helpful if they'd talked to me in greater detail about my interests prior to selecting managers. But then again, it seemed like a complete mess in terms of scheduling.
The interviewers were all incredibly nice though. Great atmosphere and culture they have.