agree with Benjamin and Guennael reg. the general perception of RB in the market and exit opportunities.
One thing I'd like to point out is that RB has a bit of a culture of maybe "perception of culture" problem. They are often perceived as a bit tougher, brutal and hard-nosed than other consultancies. I have had a couple of colleagues go there (or come from there) who have more or less confirmed that.
I know a lot of people that don't vibe well with their culture. And I know also people that would not hire someone from RB. (Before you feel too shocked, I also know people that wouldn't hire Ex-McKinsey. Although those are the only two names I know that people explicitly exclude, for different reasons, though).
But if you can see yourself working in a place that's a bit tougher, I believe it's a good firm.