I wouldn't be celebrating just yet as Obama didn't do this out of the kindness of his heart. He wants Snowden and Assange. Either one will do, and both have stated if Manning was pardoned, they would return to the states. I need to find those articles once more as I may be recalling Snowden's remarks incorrectly. I know Assange made that promise which stuns me. He cannot get a fair trial here. He will be Gitmo'd. That also applies to Snowden if he is not pardoned. Both are far more valuable than Manning is.
I'm glad he's going to be free but this is going to prove out to be a very expensive pardon for the other two. Doing deals with the US is never a good idea. The US always deals from the bottom of the deck. Always.