Pros
Good benefits. If you're lucky, you'll have a good supervisor or manager who will protect you from all the negativities in the company.
Cons
No room to move up. All the higher positions are given to Korean expats. Can't participate in some meetings as they are in Korean. Long work hours. More than 8 hours of work each day (around 10 to 12 hours of work) and they expect you to finish everything every day but they will question you if you apply for OT too much and then be blamed if you fall behind. So you end up working extra hours for free if you want to catch up with work. Orientation talks about how Samsung Values its people and its corporate responsibility. But reality is different. There are managers/executives that shout and yell at employees as if we were in the Middle Ages. And even if the employees complain to HR, the company does not do anything about it as they would rather keep the executive than the lowly employee. Thus, good employees just give up and either stay and be miserable, or resign to preserve their health, or find work with another company.