You can put the discount code DIETCLUB which is a card where you save 10% for a year. The cost of the card is $20, but I saved $19 on my first order! It is well worth it.
If you type it in, it adds the card to your order. Then everytime you place an order after, before you check out it automatically takes your discount. Don't type it in again because I think they will charge you for a second card.
I have used the products containing aspartame and it hasn't seemed to affect my loss.. I was worried at first, and when I can, I get the ones containing sucralose. But it hasn't made a difference.