You pay between 12 and 30 dollars a month and in return you get a bunch of different things, depending on which state you're in. Unlimited free phone consultation, like, 70 hours of trial and trial prep time, free document review and preparing...25% off other things, 24hr assistance (read, get out of jail free cards), bunch of other stuff. Overall it's a great service, many companies are starting to carry it as part of standard benefits packages.
It's also a multi-level marketing thing, but it's done pretty quietly and in the background. Lot of money to be made...the movers right now are turning 2-10k a month.
It's really a good service to have, especially in today's sue happy world.