GNC
Coupons Plus 8.0% Cash Back

I love GNC products. However, unless you pay full price or buy at the store without any cashback or coupons, you may be in store for a few surprises.
Depends on your order, GNC may ship your item in many packages and you report only one shipment of your order or so. For example, my one order was split up into 3 shipments (3 different UPS tracking numbers) that all arive the same day. GNC would only report 10% cash back for 1 shipment(usually one that contains the least expensive items) or only partial cash back.
In addition, GNC will cancel your discount code without notifying you and will charge you full price for your item. A month or so back, Fatwallet had the GNC promotion for 30% off orders of $150 or more. The discount shows throughout the ordering process and my confirmation email showed the total after discount. However, I was charged full price since GNC cancelled the discount when they shipped and I was told that it was fully within their right to deny any discount or promotion. They also refused to give the 10% cash back from fatwallet too, of course.
So.... order GNC products that you like, but do be vigillance about cash back or discount promotions from them. They do make some of the best tasting proteins and supplements though.....