Pros
Typical start up situation--allows for rapid growth and career development. Some amazing and brilliant people.
Cons
Oddly enough, among so many brilliant minds, I felt as if I was getting dumber by working here. On my team, Middle Management did not trust or care to delegate decision making and autonomy to lower level managers or subject matter experts. Decision making on their level would swing from extreme risk aversion to sweeping changes with no risk mitigation, making projects difficult to predict. Favoritism on my team was rampant and hardly ever seemed to be based on aptitude, but rather who was most submissive to management. Though a start up with lots of work to be done, many team members were more focused on their own advancement and promoting themselves without doing much important work, and would bring down others to get ahead. Additionally, Grail may be innovative in some ways, but not in product development; they are far behind similar companies. Little chance to see and be a part of innovation combined with frustrating management and toxic culture made for a difficult working environment.