humble...it doesn't work as well as you hope. You must have enough dollar volume to account for each coupon. For instance...if you bought $450 in stuff you could use 3 $40 off $150 (if they exist) for a total of $120 off; or you could us 9 $20 off of $50 (if they existed AND would let you use this many) for a total of $180 off. Three seems the most CSR's will let you use now. You can use a combination of 3 existing coupons to make what ever total a little more pleasant to swallow, but current the best percent off coupon is $25 off of $75 and I believe there are only three available. The best combination possible would then be $75 off of $225, or 33% off of $225. You purchase could be for more money, so you might would want to use higher priced, lower percentage off coupons for a lower total price.