Mostly behavioral questions with a variety of people in the company with different jobs. There weren't any gotcha questions and all of the people I talked to were nice. The whole process took a couple of hours, but wasn't stressful or anything. They seemed like they were looking for a personality fit primarily.
Interview went smooth. Met with several managers, went on a tour of the facility, and was offered the job within a few days. Not many questions were asked. Most based off experiences.