Pros
Good, dedicated people at most sites. Lots of "career opportunities" due to high turnover creating a constant stream of openings.
Cons
1. Terrible leadership and management
2. Constant cost cutting without thinking about the ramifications
3. Continual acquisitions that don't get integrated properly before the next acquisition. This leads to a chaotic organization that is constantly changing. It also sparks a catastrophic clash of systems as Entegris tries to force everything into SAP in less than 12 months, regardless of the size of the company they have purchased.
4. This acquisition strategy makes the financial numbers look good when buying private companies because no one can evaluate the true synergies that were accomplished. All that is available is the picture after the acquisition, not before. But when they bought CMC, a public company, they clearly destroyed shareholder value that existed when the companies were valued separately.