I made mine and I am a big fan of them.
When I push in the clutch, I always push the clutch all the way in. (some don't)
I like the fact that the travel is lessened and the clutch catches so much quicker.
The problem with clutch stops for newer cars is that you can't go too agressive or the car will think the clutch isn't pushed in and you won't be able to start the car.