This is a GREAT deal. If you have done it in the past, you can do it again.
But note you need to make a new account. Also, after the shipment arrives, you need to log into your account and cancel your membership. All of that can be done online without needing to call anyone.
Below is from their website:
After your order arrives you can cancel with no further obligation… meaning you will NOT ever be billed again or sent anything more! If you decide that the Gevalia Auto-ship program is not for you, just call this number-1-800-438-2542 or cancel your membership by logging into your account online. This offer is good through 12/31/12.