This is clearly a scam. I don’t need to buy one to with it out. The only 5 star reviewer says he is suspicious that people give 1 star reviews without buying them, but it is very simple: there are red flags every where. 1. Your cannot leave a review at their website, try it, it disappears as soon as you reload the site.2. The physics and engineering are incorrect.3. Their review don’t match the real winner reviews.4. They say it starts to work after a few months, but it either if it doesn’t. This is just a way to keep customer from commissioning.Their claim of 90% savings are impossible. If this was good there either be millions worldwide, everyone would be raving about it.