Pros
Great PTO package, fair salary, great add'l benefit offerings (eg, long term care, life, ad&d, etc). Worth noting that for an insurance company, the work feels more noble than others - Unum's products are literally there to help when people are facing tough situations. It's helpful to be aligned with a worthy cause for those times when typical work challenges get you down.
Cons
Rampant ageism. It's increasingly clear that only executives get to retire on their own time - others are "job eliminated." Regular restructuring results in many position cuts, even top performers - no job is safe anymore.