It makes for a smoother throw than the spring it seems. I will say I think it would benefit from one more magnet in the top part. Right now I have 3 in the bottom and the other two in the top and it doesn't push the switch as far down as I think it should. Still like it better than the spring though.
I use 3 and 2 magnets in place of the bottom spring, and left the regular spring in for the delrin ring. If you go to 6 magnets, the spring may not depress all the way, depending on which revision of the switch you use...but magnets won't wear out