Although I have (and like) the CNS... I gotta agree if for no other reasons than quality, parts availability & clear, concise instructions
...I jus' like to tinker w/stuff and the CNS was unexplored territory
But I gotta warn ya, no matter the brand, the more complex the carb - the more tinkering it requires, if you don't like messin' with carbs then you may wish to stick w/stock *shrug*
ofc a marginal performance increase and I'm not fond of the stock carbs - but their simplicity can be a benefit too... do you have an expansion chamber exhaust? That'll give you more bang for the buck and it's easy as pie - truly a "bolt n'go" performance mod.
Jus' a thought