Geico being a "discount" insurance company, I was always afraid that if i had an accident they would be a pain to deal with, but when I got smeared by an uninsured driver last summer, (speedmaster totaled, both ankles broken, 2 months in a wheelchair) they were suprisingly easy to deal with. They immediately paid for my bike, gave me money to replace my jeans, boots (cut off by the EMT's) and ipod (no, I was not listening to it while riding.) Soon after, they gave me my $25,000 on my uninsured motorist policy. My only problem has been my work health ins., who gets the first crack at the 25K th pay for my medical bills. They haven't decided how much they want of it.
Long story short: Geico good.