Man this thing is awsome! By habit I always use 2 fingers to work the clutch and in traffic you tend to cramp up on a stock setup. My slave went out so I ordered a STM I put it on bled it out and went for a ride, its like night and day. I actually put the might vac back on it because it seemed to easy to work the clutch there were no more air bubbles it just made the clutch so much easier to squeeze for $190 bucks it was well worth it.