Pros
Depending on how your manager functions, you get your own projects from day one as a research associate in R&D. Requires you to learn how to work with cross-functional groups. Requires you to learn how to make informed decisions quickly. Awesome maternity leave. Summer hours (depending on location). Higher starting salary than most entry food science jobs. If you are luck you can get transferred to some pretty cool countries.
Cons
RB talks big but hardly ever carries out the talk. Ridiculous timelines to just "get stuff on the shelf". Reformulation is almost guaranteed for every project. Getting promoted is sometimes a political game. You may end up in the same position for a long time doing the same thing if you don't try and push to get something else. Marketing gets moved around so often that you hardly ever start and finish a project with the same people. This makes things very frustrating and complicated when it comes to solidifying project concepts. Serious lack of ability to plan ahead for a brand unless it is one of the large brands they care about. Bonus structure is not great.