The comments so far have been, for want of a better word, "broad".
Contrary to popular belief, this "device" is not a gimmick. It is actually quite functional despite a few points.
Firstly, about the warranty...some have quoted 2 days (48 hours) in which to return the device if not satisfied. This is not correct vis a vis & from the website;
"Is there a “Money Back Guarantee?
Yes, 60-day money back guarantee. If in 60 days, you don’t see reduction in usage on your electric bill, call us and let us know, and we’ll give you details on how to return the unit for a full refund of the purchase price. Installation cost will not be refunded.
"***NO returns/exchanges will be honored If you return an item or items to us without notifying us within 48 hours of receiving your order. Returns received without 48 hours notice, return confirmation & after the 7th day will be REFUSED. Packages will be returned back to you. No refund, exchange, or store credit will be issued.
These two paragraphs "unclearly" state that if one does not notify the company within 48 hours of receiving your order,
returns or exchanges will not be honoured. Obviously, the supplier needs a time from which they will start "counting" the warranty period. This is much the same as buying any other piece of equipment, eg an electric hand drill. You are given a period of time in which to lodge the warranty form, usually up to 1 month.
Secondly, the device is defined by the supplier as a Power Factor Correction device. Basically, it's a capacitor that's connected in parallel to the supply. In the case of the Power-Save 1200, my guess is that it is a capacitor rated at 1.2kVAR, which seems about right according to my calculations (based on the demo video footage).
What is not discussed is how the energy supplier bills you. For example, in Australia, Power Factor will make little difference (if any) to the power bill because consumers are not billed on Maximum Demand & consumers are supplied with "Induction disc" Wattmeters. A 1kW motor will absorb 1kW, even if it has a low Power Factor. If it has a low Power Factor, more current is used to make up for the inefficiency. If it has a high Power Factor, less current is used but the same amount of power is used. Most kWH meters only measure kW. On the other hand, if your electricity supplier can measure your Maximum Demand (the peak amount of current over any 15 minute period), you may be charged extra if your Maximum Demand is high. Is this the case in the USA?
Thirdly, you will save a small amount of money if you use Power Factor Correction because equipment will operate more efficiently (intrinsically) even if you are not billed for Maximum Demand. This cost saving is generally unnoticeable.
Fourthly, the device is UL listed but the listing has nothing to do with saving money. See the links below;
People in Thailand have tried to sell similar devices but like Australia, consumers in Thailand are not billed for Maximum Demand & so the money savings are unnoticeable.
The "standard" induction disc Wattmeter cannot measure Power Factor & therefore cannot take into account any inefficiency introduced by Power Factor. It only looks at torque (1) produced by "in phase" current & torque (2) produced by "in phase" supply voltage. A phase difference between the two will cancel each other (ie poor Power Factor). On the other hand, electronic Wattmeters may be able to account for such inefficiencies & therefore charge accordingly.
I could build the same device for less than US$50.00. Installation would be extra. For $300.00, I wouldn't buy it. Any "sparky" with half a brain could do well from such a device, even if selling it for $100.00 (one third of the price).