Pros
Great work/life balance. Great training programs (at least prior to the merger). Ample travel opportunities. Opportunity to learn and contribute cross-functionally. Great people at the plants. Most plants have a close-knit family feel, at least among the local employees.
Cons
No opportunity for advancement if you are not willing to move. Most plants are in isolated locations. The benefits that were considered among the top of the industry (pension plus 401K, good health insurance) were drastically changed as a result of the merger. The merger was handled poorly with many in management not knowing whether they still had a job more than 6 months after the official merge date. The integration of the two companies has been a struggle. Management is not transparent about the future with respect to changes in position, changes in benefits, elimination of bonuses, changes to salaries and classification, severance eligibility, etc. The confusion and frustration caused a pervasive culture of negativity in plant management.