I cannot wait until ShadowPlay becomes available for the GeForce Experience. Then when all these fools cry hackusations, I'll be prepared to advise them to check out the YouTube channel where I'll upload the match. I think ShadowPlay has an opportunity to really be a productive tool.
It's been said it will take up very minimal resources and not effect the FPS as much. Also, looking forward to it shrinking down the recording size more than anything.