Pros
GEICO offers an amazing benefits package: health, vision, dental, Vanguard 401K, profit sharing yearly. Highly HR sensitive, so you'll never put up with the crap you do at other companies. No working off the clock, no "can you stay later", no harassment etc. Plus, you learn a thing or two about the insurance industry. Great resume builder.
Cons
It's a call center. If you want to be micromanaged beyond belief, sit in one spot for 8-10 hours a day and be treated in a pedagogical manner, this is the job for you. I felt like a telemarketer more than an insurance agent. Training is absolutely horrid in the long run. Organizational development is not found anywhere within this company. Limited opportunities to advance, as everyone is gunning to get off the phones. They do not respect your own personal goals, qualities or motivations. As a graduate student, I was told I needed my "core business" classes (associates level marketing etc.) to advance; which is a complete regression of the education I have already obtained. Overall, I felt extremely undervalued; I was a number, not a person.