I have the swift shift kit and love it.
I originally put in the Schnell kit and hated it. Took it out after 2 days. Poor imitation of the proper kit, too many compromises to get the cheap price IMHO. The needle bearing and heim joints used in the EVOM kit is first class.
My P-Car mechanic didn't know what I did but he commented that the shifter feels like a knife though butter.
See this link for past review of the product:
Vertex / Schell short shifter review