I've only had Geico for the last 14 years or so. No problems, but I've never had a claim. I usually will do a comparison everytime there is a major life changing event-moving, new job, etc. I have stuck with Geico because they are the cheapest and I like their customer service. One service the last time I checked said they just couldn't compete with Geico since I had been with them for so long with no claims.

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1984 300D turbo, 250K
1971 MGBGT, 101K
2007 VW Jetta, 4K