Just because someone calls it "performance" doesn't necessarily mean it's better, faster, more powerful. Performance can mean good or bad. You're going to find that the majority will say you traded good for bad. The CNS has a nasty reputation but there are those who have mastered them, use them and swear by them. Fortunately there has been a lot of discussion here about that carburetor. Use the search feature, type in CNS, and you'll find lots to read.
Good luck with yours.
Tom