Pros
KLA was one of my favorite jobs, with a fantastic manager and team, and interesting projects. Stable long-term outlook. Good for women and minorities. DEI is a focus. Long-term safe in general, with engineers not being layed off (they did recently layoff some recruiters though). Bonuses are reliable. In Covid they didn't do any layoffs and also still gave out bonuses. For most people (but not all people) work-life balance is good. Management also supports career mobility. Benefits are very good (excellent insurance, fertility benefits, pay off your student loans, pay you to exercise, etc).
Cons
At least last I checked they were still wanting people to come into the office some, which seems unnecessary for some positions. Also in general my work-life balance was great, but I had a colleague forced to cancel his vacation, and some teams require long hours (but my personal team and work-life balance were great which I think is more the norm).