I just switched from State Farm to Nationwide and State Farm was reasonable, though I wasn't necessarily happy with the coverage. It was only $79 a month for full coverage, but they didn't have accident forgiveness, if I got into an accident, I would have to pay 20% of the rental fee for a car, and the lowest deductible for collision they will go is $250. I switched to Nationwide a week ago and the quote was for $70 a month, (every little bit counts) but the big difference is the coverage. I got accident forgiveness included, also they pay 100% of car rental fee, and I only have $100 deductible for collision. However they do have $0 deductible but 100 I can do. This is for a 2011 Ford Focus which Focuses are generally cheap to insure.
I was with Liberty Mutual for about 15 years and was very satisfied with their prices and service, although I never filed a claim. When I retired and moved from California to Florida, my auto rate went up a ridiculous amount, to almost $10,000 a year even though I had no accidents and one minor moving violation in the last ten years. On top of that, Liberty Mutual screwed up my umbrella policy and told me it was “unenforceable,” whatever that means, but I had to pay for the policy anyway up to the time I canceled and switched to Progressive, which cost about one third the cost of Liberty Mutual for an identical policy. Even good companies change over time.