Pros
Repeating what many before me have said: - Seoul: Seoul is a great city, and Samsung makes the move easy. - Coworkers: GSGers are terrific--smart, interesting, kind, collaborative--and come from a variety of different backgrounds. - The work (inconsistently): Some of the projects you'll work on are really interesting and you'll get some cool opportunities to work with overseas subsidiary teams, many of whom are great. (Covid has changed much of the international subsidiary engagement, hopefully only temporarily.)
Cons
Read other reviews, as well, but I'll pick on three things in particular: - Career growth: Career growth is extremely limited, particularly "on the line" in Samsung, where most GSGers are shuttled into low-level individual contributor jobs on teams of ranging levels of hostility, and GSGers struggle to integrate with their teams and move up the ranks. Not many GSGers--or foreigners in general--"make it" in Samsung in Korea. - Inconsistency of experience: The expectations for Global Strategists change dramatically from one cohort to the next, as GSG overcorrects from whichever mistake it made the past year (e.g., under/overhiring, promoting too slowly/quickly, favoring certain personality types/work backgrounds, etc.). Within cohorts, experience varies significantly as well. Leadership isn't incentivized to optimize for team satisfaction, so leadership levels of interest and engagement in improving the experience vary. - GSG/Samsung HR/admin: It's certainly not the worst company, but GSG has a tendency to shoot itself in the foot over a lot of things, both big and small (that's one of the reasons you see so many fuming Glassdoor reviews when people exit). Additionally, Samsung (or GSG? It's hard to tell) is extremely inflexible and opaque. There are about 100 million rules, invented by invisible departments (no one will take ownership, and any hopes of elevating your questions one level up will be absolutely squashed), which are completely rigid and yet totally inconsistent, and very few of them seem to make any logical sense. The rules cannot be changed, and you also cannot get any answers to any of your questions about them. Dealing with this is an unrelenting headache for employees and very strange in 2021, when many other companies globally are becoming more flexible and transparent.