I have had Progressive for about 2 years. I had Allstate before that and theur rates got too high.
I have a few complaints about Progressive but nothing big. For one, it irritated me when they gave me an E signing discount at first and charged me for it at renewal time. I think that was $54.00.

Overall, they are lower in rates than anybody I can find. I have full coverage for my lease car. I guess I'm pretty satisfied with them.