Dropt...  In Hawaii we pay 43 cents a kilowatthour, and other places have similar woes. Savings with PFC's are achieved through magnetic resistance being lowered through resonant pulse, and has absolutely nothing to do with "Quality of service" You really should read a bit more before judging the cuisine. Simply put, the more electric you draw, the higher the savings will be, on a sliding scale. The more power you draw from your meter, the harder it is to draw more, it's called resistance, which is what this fights.  PFC's make everything run more efficient by enhancing the magnetic field induction which moves the current, especially if your home is full of appliances which use capacitors, making all of them run more efficient with this magnetic field. It will also make those PCI connections COOLER for the same reasons.
and if you read my comment, it was meant for those who have multiple machines for that reason.