Even if it produces a hotter, fatter spark, it is hard to imagine how it could result in any more power than a normal spark from a modern ignition system. Interesting they don't mention any effect on plug life... one might suspect that it would be reduced.
Past Hondas:
1960 125cc Honda Benly CB92R
1964 305cc Super Hawk CB77, the only vehicle I have ever bought new in my life!
Honda CB160, roadraced as 175cc 1967-1970.
Honda Lawnmower, bought used in 2003, caught fire and melted in 2005.