Pros
Great balance if you have lots of priorities away from work. Great mission, very kind and caring people there for the most part. The whole concept of an Insurance and Financial Services Fraternal organization is a great one, and Thrivent is uniquely positioned as the largest. Thrivent's mission will appeal to those who want their work to mean more than just making a living. The "Do well to do good" mission is unique to Thrivent of all the places I've worked. Personally I will also say that my immediate peer group and leader were great colleagues and a joy to work with.
Cons
The average skillset (especially in IT) is quite low. Long tenures mean many there are stuck in their ways and have not learned much new in terms of skills or processes. Sr. Leadership does not recognize the limitations of the IT skill gap and the damage it is doing to the viability of the organization. And when people from outside try to make things better they are stymied more often than not by the incumbents. Also, since Thrivent is the result of two predecessor Lutheran Fraternals, there is even now a notable schism between the former AAL (in Appleton, WI) and the former Lutheran Brotherhood (in Minneapolis, MN). This really needs to be fixed and will require very strong leadership to do so.