The MSD is king for cruising. Cruising is where rpms allow multiple sparks. I changed out my '68 427 vette from factory transitorized ignition to MSD and it made a tremendous difference in starting, warming up, and cruising. I'm a believer.

As for the plugs it looks like they are using an internal inductor to boost the voltage but the net spark energy actually might be less due to losses in the inductor. They claim enhanced power. I believe that but it is more unclear what the end effect is. And reliability is king here and they are relatively untested.

Kitz