Pros
This is the best company I've worked for in many areas. They offer competitive salary, excellent insurance and benefits, as well as additional perks. They frequently have events or ways to show appreciation to their workers that far exceed anything I've seen at other companies. The department I work in has an excellent manager and is a great environment to work in. I also enjoy dealing with others from different departments and I think it shows that a company who takes care of it employees has happier employees who do a better job.
Cons
The only downside to working for Lam Research isn't really a downside if you don't mind hard work. They do have high expectations for their employees, but they aren't ridiculous expectations. Work hard and you will be appreciated for it.