Pros
Working at KLA-Tencor definitely provides many unique and challenging problems that will keep many people engaged in the day-to-day work. If you have an engineering background (especially electrical) and you are now doing software development you'll be glad for the engineering background! If you (a software engineer/developer) love machine control or algorithms development then this is the place for you.
Cons
Sometimes the software seems like a "necessary evil." KLA-Tencor (KT) is definitely in the business of developing and manufacturing tools. Someone looking for the ideal "software developer" job may be left wanting more. The focus is on the tool and developing the software necessary for operating the tool and producing results with the data gathered by the tool.
