Just switched from State Farm to Geico, and while I didn't save bundles, I was able to up my coverage and Geico was still cheaper. Their online quote system needs tweaking, but I had to speak with two sales people via telephone, and each were super nice. I had received high quotes from Geico in the past, so I am glad to see their rates are less than State Farm now. It probably has more to do with State Farm being high, now.
Why did I leave State Farm? I am making a statement regarding their unwillingness to pay claims from Katrina, and their pulling out of Florida homeowners coverages. I basically non-renewed my policies with State Farm. I just found out that my mom also dropped State Farm recently, and is now with Geico.
It was Skunkape who recommended trying an auto-insurer like Geico, so thanks, Skunky!