I have to admit: on the TFC I only use the clutch for starting at 0 - all the other gear changes made by the Quick Shifter are much smoother than I could have ever done it by myself...
Does it have to be turned on at the first service? At over 1,000 miles I've yet to notice any difference between my TFC's shifting and that of my other bikes which do not have quick-shift...A mystery.