Summary: As of 7/24/2014 these card still work and give you the full 60 days as promised. Recieved them about a weeks time. To activate, click the "Go Gold" tab on your Arc games launcher and it will direct you to the proper site to input product key. Pretty good bargain especially considering CO is on its last leg.
Summary: This game is in every way shape and form a step back from a game that already came out 10 years ago - City of Heroes. Why they decided to continue Champions Online and completely shut down CoH completely baffles me, I guess the microtransaction model was already in place for Champions so it seemed more profitable.
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.