Pros
Great work life balance and practical business use cases for data scientists. Lots of opportunity for growth if young in career. Great business stakeholders, especially in Aetna business.
Cons
A&BC (the data science COE) is not a place for senior data scientists. Most in leadership positions are ex-Consultants (in fact, if you have McKinsey on your resume, you're a shoo-in for at least a Lead Director role) and have limited to no first hand data science experience themselves. The glass ceiling between data scientists and leadership is embarrassingly obvious, and most 'senior' leaders are way more qualified to lead their teams than the junior ex-consultants they report to. I wouldnt work in A&BC if you have more than five years data science experience, the org won't know what to do with you. Even better, just go work at McKinsey. You'll get paid a lot more to put up with your leadership's misplaced condescension.