Ventajas
You can expect at least a cost of living increase year over year. The company offers gainsharing with all employees at different levels which provides a nice end-of-year bonus in profitable years. Most of the non-management employees I worked with were great people and many of them became good friends of mine.
Desventajas
The politics at Progressive are as bad as I've ever seen or read about anywhere. Workloads are unreasonable, pay is below industry average and the company has a track record for unethical behavior including using private detectives to infiltrate a church group to spy on a couple suing the company in back in 2007 (don't believe me, just Google it). There were constantly changing standards for how claims should be handled and very poor communication of those changes down from the corporate to regional to local levels. If you're willing to brown-nose and get in good with the right people, you'll be set. If not, you're in trouble.