Discount applied at checkout. Stacks on top of the Subscribe and Save (S&S) discount, which maxes out at 15% if you have more than 5 items subscribed in a month.
Here are some of the deals I like:
Barilla Whole Grain Penne, 13.25-Ounce Boxes (Pack of 4) - $3.72, can be as low as $2.98 with maximum S&S discount
Barilla Whole Grain Thin Spaghetti, 13.25-Ounce Boxes (Pack of 4) - $3.69, S&S not available
Note the link does not include all of the products included in the deal, so be sure to do a search on Amazon.com for "barilla" to see what other products are included in this offer.
Some are Add-on Items, but you can get free standard ship with S&S.