Pros
Reasonably competitive compensation package especially when the business perform. Opportunity for advancement is available if you are willing to relocate as well as at WHQ. The company's view of work-life balance is very reasonable. There are a lot of good people working in the company and the focus on continuous improvement, safety, quality is constantly being strived for.
Cons
Benefits seem to be declining a bit in recent years, particularly on the health care side. Department/plant staffing can be pretty lean and getting leaner with the expectation of everyone picking up the slack. Although OC is one of the most recognized brands in the market (shingles, insulation) they still are commodities and not very glamorous commodities at that.