These types of systems have been used in industry in the UK for many years
successfully.
This is the first system I have seen aimed at the domestic market, these
types of system work well, particularly where you have a large inductive
load (electric motors).
Electric motors used in washers, fans, air-condition units etc all operate
with a low power factor when running with a low load, by using an automatic
power factor correction system, you improve the power factor and thus reduce
the amps drawn from the supply.
A great idea.

BillB