Met with 5 individuals from the company, including managers and coworkers.
The hiring manager interview consisted of bringing me up to speed on the company and the role, and reviewing my experience.
Interviews with other managers and coworkers dug into much greater detail examining every corner of my resume for relevant experience, and testing my skills with problem-solving questions relevant to the position.
The people were friendly, the atmosphere was comfortable, and the questions were a bit challenging. I enjoyed the interview, but I would imagine an interview like this could be stressful if you didn't actually have sufficient relevant experience.