I purchased two of those. They redeemed simply effective. Xbox will give you an additional month for turning on reoccurring billing. Should you flip it off earlier than redeeming extra, they hold supplying you with the free month for every you renew. Two of those plus renewing the one month (my GP had expired) resulted in 9 months of GP Final (3 from the cardboard, 1 from the additional month for turning on reoccurring billing) x 2 + paying for 1 month of GP to transform all of it to GPU..
