I've got the Sachs, the first day I drove the car with it fitted I was coming back from London in a 10 hour 1st gear 2nd gear traffic jam stemming over 250 miles, I was on / off the clutch that much a brand new pair of Adidas trainers soles bubbled up !, leg was like jelly when I got home couldn't even play football the next day !!
I'm used to it now though and every time I drive a normal car now I think, this car is for sissys !
( in conclusion the Sachs is quite stiff, got a very high bite point and a little noisey