[Excaliber]

From the web site, http://www.hydrogen-boost.com/alternatives.html

We still maintain that a hydrogen generator alone is not likely to produce a major increase in mileage (see http://www.hydrogen-boost.com/savefuel.html) regardless of what our competitors will claim.

Seems like their $1,000.00 complete kit contains more than just a hydrogen generator. Something about a fuel heater and additional components as well. From this I would assume that it does indeed take more than just a hydrogen generator to 'get r done'.