Pros
It is generally a pleasant place to work and co-workers tend to be interesting individuals. The 401K and health benefits package is good and inexpensive. The site cafeteria is very good, and cheap. They are good about keeping new-ish computers and other tools updated for people to use. Considering the chemicals used in making semiconductors, the safety is very good.
Cons
Managers: Runs the gamut from great professionals to petty tyrants. The company culture does not seem to cultivate any uniformity there. Roll the dice. Vacation: They call the vacation package "flexible time off", but ST forces employees to take many hours/days of vacation at arbitrary times in a quarterly effort to make the books look good, even when the employees do not want to take off and do not have to take off for business reasons. Disciplinary action is threatened in writing against those who resist.