I did it last time and the nice woman there reminded me I can only order it once a month. Not an issue really for me in Florida.
I thought it was redeem it once a month. Example, use it on 3/8/2012. Buy another one 4/1 and redeem it on 4/9 30 days later and I am OK. Nooooooo she said....
She said I cannot even buy it before the 30 days. It is the purchase date not the redemption date that is looked at. Therefore, I cannot buy another one until 4/8 which is what I will do just to be safe. I go back 4/4.
I just pass it along for what it is worth. Maybe someone can avoid a problem.
V