Ranked in these QuestionsQuestion Ranking
Pro GPU accelerated encoding
If you want to record 1080p 60fps, this will get you there. If you were having performance issues using CPU encoding before, Shadowplay will most likely work 10x better that you swear that it doesn't appear to be recording at all.
Pro Allow recording video after the fact
ShadowPlay can set up a recording buffer and only save to a local file if needed.
Con Nvidia cards only
Only works with Nvidia cards, so those with AMD cards will not be able to use this app.