Involvement:Expert (understands the inner workings) - Ownership:1 week to 1 month
Easy to use (plug-and-forget). Relatively small size. quality feel and look (which hopefully will warrant a long life-time).
The manual was nearly useless. I'd rather get a link to a Wiki page with the description than that type of useless paper.
The device is a must have for every household. I use this or similar devices in all my homes and I do notice the power efficiency. Please note though that the device's efficiency depends on the number of electric motor appliances in use. You won't get anything for a home with just tungsten lamps. But if you have a fridge, use a vacuum and an air-conditioner regularly then you need this power-saving device, for sure.
Normal household will notice some 10 to 25 per cent of efficiency, which will return the cost of the device in just several months.
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