How secure is FileVault?

I’m pretty new to the world of Mac, having used mostly Windows PCs for more years than I like to admit. I’ve never used FileVault before, but I just turned on FileVault on my work issued MacBook. Is this really a secure encryption method, or is it just a weak “consumer use” security blanket?

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Story added 19. December 2012, content source with full text you can find at link above.