Pros
Your peers will be incredibly intelligent, great diversity and commitment at all levels. There is really rich analytics expertise across the firm, pipeline strategy and market research as well not to mention really deep disease area/scientific experience that is highly diversified (especially in the less senior team members). Company leadership is very passionate. Work/life balance has its ups and downs but in the grand scheme of the consulting world its really good. No constant travel for most employees. The company is very proud of being merit-based and I've seen it in practice; also growing constantly, both in hires and clients.
Cons
Struggling to unite so many offices (100 employees spread across 5 locations) under a single company culture, this negatively effects some of the logistics and operations internally which could use a little work/streamlining. Not all projects are equally interesting (but they move and change consistently).