Summary: To redeem, you have to install the Arc client (a new front-end), click on your account name in the upper right, click on "My account," then on "Manage Subscriptions." There will be a radio button for Redeem Card that should accept the code on these. And, unlike some who have commented here, I used one and got a full 60 days of membership, which saved me over half of the regular subscription price.
Summary: Paying about $10 USD for 60 days is an incredible bargain. Since it usually costs $15 USD a month (30 days) for a regular subscription, I recommend purchasing these cards if you wish to Subscribe to this game.
Summary: Although the game's moved to a subscription-optional model and is being administered by a new company (Perfect World), the codes on these time cards are still honored for 60 days of gold level membership. With a price point lower than the base subscription price, it's kind of a no-brainer. Think of it as your savvy shopper discount.
Summary: To anyone wondering if these will still work with the game, as of this review, they still do! You also get the free monthly 500 zen which is also great. So go ahead and get them while they last!
Summary: Who wouldn't want 2 months of CO for 45% of the cost? This sale is awesome and I would soak up as many of these cards as you can before this sale ends. That is if you plan on sticking around CO for a while. I have already bought 3 of these, all worked fine. The packaging for them is a little ridiculous (a little gift card comes in a dvd case), but who cares, its cheap time! Just ordered 2 more.