Just speaking from personal experience on my 3xv racebike I'm dead happy with the zeel.
Came pre-wired and ready to run .
From reading the old posts
I don't think it was always so easy ☺.
Bike starts easier and sounds crisper .
Plus I picked up 10 hp over a standard cdi but that was mainly because my setup was not suited to the standard cdi.
They would be a good upgrade even on a fairly standard roadbike in my opinion
.