I had a short phone screen and then waited over a month for the on-site interview. The in-person interview was with 4 people. And pretty simple and straightforward. Nothing tricky or complicated, just discussing my experience and the role. I got a tour around the facility and it was easy and went very well.
Overall, I would not reccomend looking for an interview here. The managers did a poor job interviewing. Did not really ask many good questions, and instead just spent time talking about what they do on the job. Failed to mention there would be a lot of travel until I had asked about it! They stated could be 50% and a few weeks at a time. This is something you should definitely let people know about. Needs to be better from such a company like this one. I hope lesson can be learned here.