I had it for Shadowplay and although the low impact on performance was nice I didn't like the quality of the videos it outputted. They were "OK" but not that good. For sticking on YT they're probably OK as YT butchers them anyway but I would rather use other capture software.
This is one of the reasons I still use fraps as well - though newer versions have improved the capture quality of shadowplay a bit - but for a properly edited/produced video you really want a bit higher source quality than shadowplay provides. For realtime capture especially of competitive gameplay though you can't really take the hit of fraps.


