ACW
Looking at their website, it doesn't sound like a good deal to me. You have to pay in advance for printing all of your books, and if you want distribution/fulfillment, you have to print at least 2,500 copies. You pay for the printing of your books UPFRONT (which will cost thousands of dollars), and they are printed and warehoused. Then, in addition to that upfront cost to print, you pay:
(1) 1 cent per book per month for warehouse space
(2) $10 per month to administer the account
(3) $400 per year set-up fee (waved the first year for printings over 2,500)
(4) 70 copies of your book (You have to pay to print 70 copies of your book which they keep and then give away free for promotion purposes) (So, about $280 for a 110 page book)
Wow! This is adding up.
They sell your book for you through online retailers and thier 1-800 number, giving you 35% of the retail price. Now, 45-55% of that goes to the end seller (i.e. Amazon, etc.) as a discount, but 10-20% of that they are keeping, on top of the $520+ they are charging you per year.