Ventajas
The average employee is fantastic. When you find a great manager, they are a pleasure to work for. There are opportunities to grow one's career around the world.
Desventajas
Having spent more than two decades at this company I can assure you that (with very few exceptions) managers are trained by boss expectations to manage upward. Their employees are valued for what they can produce to make the manager look good and nothing else. The company attempts to portray itself as a benevolent organization where each employee cares as much for their customer as for profit or individual advancement. Actually, shareholders, executives and the C Suite think short term profit above all else unless forced to by govt pressure. The company is extraordinarily risk averse. Every 2 or 3 years they introduce a new "philosophy" or cultural change that "will improve employees' and/or customer's lives". These changes are implemented from the bottom up, top management/executives are exempt. i.e. destined to fade into oblivion.