It works! I just scored Pantene shampoo and conditioner for FREE, plus I made money. There are two rebates in Checkout 51 valid for $2.00 back on Pantene shampoo and $2.00 back on conditioner. with NO size restrictions. I found bottles of Pantene in the travel section at Walmart for $1.47. I bought both shampoo and conditioner, redeemed both Checkout 51 offers, and received $1.06 in overage.

Submit $2.00/1 Pantene Shampoo, any variety, via rebate app (checkout51.com)
And submit $2.00/1Pantene Conditioner, any variety, via rebate app (checkout51.com)

Pay $2.94, Submit for $4.00 in Checkout 51 Credits

Final Price: $1.06 Moneymaker, when you buy both