If you release the clutch pedal from the stop for launch but only stab the pedal for the shifts, the 'tamer will have much less affect on the shifts.
My car currently has the HitMaster system in place. It has a curve almost identical to the 'tamer prior to the hit, but after the hit I am able to adjust the slip duration of the clutch using timers. There are separate timers for launch vs shifts, I can tell you there is some benefit to having less slip on the shifts vs what's needed for launch. For the basic 'tamer, my paragraph above does pretty much the same thing but with less precision.
EDIT- Free is good, if that's what I had I would not hesitate to use it.
Grant