Pros
Depending on the team the science can be quite compelling, the platform is unparalleled and there's deep expertise in antibody engineering that's truly impressive. If you like living in rural NH this is a place for you - it can be a nice place to raise a family and has great access to the outdoors. The facilities are state of the art and the employee benefits are hard to match even in the greater Boston area.
Cons
You really have to have thick skin with the work hard/play hard culture. Some people have a great work life balance while others work late hours and live in fear of never having done enough. There's rampant favoritism amongst management and decisions abut you are made very quickly - you're either in the inner circle or you're not. There is ZERO emotional safety, feedback is not welcomed or taken seriously; even if delivered nothing is done about it. While I worked there I feared approaching HR with issues because of their inability to build trust with employees. HR is PATHOLOGICAL about promoting from within, even when key competencies are lacking, which makes the culture highly inbred and stale. There's no investment in manager development, which means managers are far behind best practices in the industry and have no idea how to coach and grow employees, set expectations or deliver feedback, let alone receive feedback. The company thinks that an occasional trip to a cool location can mitigate the toxic culture. There's something truly special in the quality of the science and the platform - if only HR cared to proactively grow the culture and empower people to build it together it could be such a fantastic place to work ...