I've been working with the largest auto insurer in my state. It's rough for some folks. But the pay is not bad, the goals you are suppose to obtain, well, you either get the job and find legal short cuts or you don't. If you want to know about some of the stuff people say, I found jobvent.com to be useful. It will however leave a very bad taste in your mouth. I would also like to say mostly negative people post there. Always attempt to go in with a positive attitude, judge for yourself.
I have been with my company for 3.6 years, and I still love it. Never had a bad day. Never wanted to go home and cry, or kill, or maim anyone. Progressive is an ok company IMHO. They pay better than some. My wife is going to try out for another company sometime soon. They are my competition, odd huh.
At Progressive you will learn to adjust vehicles, negotiate comparative negligence settlements, process some medical claims, and offer some money for bodily injury claims. Every company is structured differently, each with it's strengths and weaknesses. My company specializes each department for a specific task. This may or may not be the good way to do things. But at Progressive I know you will be running around a lot, you may get a company car quickly, which is cool.
Anyway. Good luck.