Security ... think about it!
What is the best part of Polywell in comparison to all other hot fusion methods currently under consideration? In mass production the reactor will cost on the order of 50¢ a watt or less and can be built in increments of 100 Mw, with a good possibility of larger reactor sizes where demand warrants it. And the device has the potential to be light enough to be used for getting into space from the Earth and for space propulsion. Earth to Mars in 37 days is one prospect. Less time than it took to cross the Atlantic in 1492.