We swear by State Farm
State Farm takes great care of us. We moved here from Florida, and after seeing insurance companies fold after the hurricanes, we were glad to be with such a solid company. We've been with them for 20+ years, and have several policies with them other than just auto.
When our sons started driving at age 16, we shopped around, and couldn't beat State Farm.
When you're looking for insurance, you must keep in mind that cost isn't the only consideration. What's important is that when you need to use your coverage , that you are pleased with the quality and compensation, and that you have a first class legal department working for you if need be.