Pros
Stable product, well funded operations, strong safety culture. Company is owned by Koch and has a very consistent company culture which is defined by their guiding principles. It is very clear that unlike many companies mission statements which get reviewed periodically as an exercise that employees from top to bottom are expected to create value, and deal with respect and humility towards others. Charles Koch is an excellent guide for the company, being privately held allows the company to focus on long term value instead of the next quarterly earnings report.
Cons
It is a manufacturing environment with round the clock operation and can sometimes require long hours and/or weekend work. Generally able to compensate for this by schedule flexibility at other times.