Real ownership, real impact
Pros
I read the Glassdoor reviews almost 3.5 years ago before joining RB. Knowing no company is perfect I was willing to take on the extra responsibility (and maybe lack of process/balance) to enjoy a dynamic, non-bureaucratic, and results oriented global organization. That is exactly what I got. Two countries and three roles later I've been stretched as individual, added value back to the organization, and worked with some great people.
Cons
Being dynamic sometimes means being reactive. It's a double edge sword. It's a competitive advantage in terms of reacting to competitor and consumer needs, but as an employee (especially one that likes to be organized and in control) you can find it hard to plan and execute in the more formal sense. You need be comfortable with ambiguity and quick decision making.