I haven't read all replies but I fitted one to my 07 it made my translogic QS I think more responsive so fitted one to my 12 also
Had one on my previous bike (Fireblade 954RR2) and it made a real positive difference...... now got one fitted to my new bike a Honda CB1000R..... Ditto to the 954, it just feels '' right'', as said above its one of the best mods i feel can be made to any bike, not fitted for bling but for real practical use.
Fitted one to my '13 Blade and it does feel much better now Very positive and can fire clutch-less upshifts through the box with confidence.
Completely agree with Hudson. It may be that the level of effect is model specific and the 954 shift rod is unsupported for quite a distance outside the casing. A notorious weak spot, but the difference was instantly noticeable, particularly downshifting where it was much more positive.