Honestly, Nemak is one of the best places I have ever had the pleasure of working in. The management admits that the department I was in, 3500 ton die cast, is incredibly dangerous and tends to be a health hazard to those that aren't careful. Which is true.
Out of the four managers I was in contact with, I only got along with one who didn't act like a pompous king speaking to a lowly peasant.
The work was hard, the pay was fair, and the employees who didn't want to work were weeded out pretty quickly. I loved working with a crew of people who actually cared about the products that were made.
Management, the internal heat in the summer, management, not enough workers, and management.