Pros
The cases at BRG are fast-paced and demanding which means you will learn a lot in a short amount of time. Moreover, the litigation work (which is exclusively what I worked on) can be incredibly interesting if you lean into it. Even with the intensity of work, the people around you are incredibly friendly and more than happy to help (albeit a bit awkward at times). BRG is a relatively young firm at the "analyst" and junior manager levels so if you are in your 20s or early 30s you will find like-minded folks around you. Because BRG is not a large consulting firm, your ability to elevate your career is almost entirely self-driven. It's certainly helpful to have a D/MD in your corner if you've fostered that relationship, but building your brand as a hard worker, good communicator, and/or creative problem solver goes a long way. BRG is also a great place to hone your technical skills and you have a license to learn new software/programming languages at your leisure. In that way, BRG is always looking to innovate and be better consultants to their clients (which makes the culture more rewarding). As with most consulting positions, the base salary and bonus are excellent. If you find a type of work that you like and you prove yourself adept, there is huge upside potential for career advancement and sticking with that work for the medium/long term.
Cons
While my view was that the pay was excellent, I've heard anecdotally that the pay at BRG was slightly below the industry standard. For those working extra long hours, this can be demoralizing if you ever calculate your empirical hourly rate. Ds/MDs are amenable to lunch outings, informal meetings, and non-billable activities, but the onus really falls on younger staff to build those relationships. In other words, Ds/MDs largely keep to themselves unless someone pushes them to make those connections. I made a lot of friends at BRG, but there certainly is a level of entitlement amongst some staff members that makes some interactions uncomfortable; especially as you elevate in the firm. If a D/MD "claims" you - it's going to be tough to get out from under their thumb. Sometimes this is actually a positive if you have a good relationship, but it can lead to folks being stuck with work they don't enjoy and/or an unhealthy work-life balance.