Review on Efficient Power Saver: Electricity Saving Box for Home, Office, and Industrial Use - High Efficiency, US Plug, Energy Usage Monitor - 90V-250V, 30KW by Cori Nance

I didn't think they would work but I bought them anyway just to see. It literally lowered my electric bill! I usually pay between $200 and $300, and when a storm hit Texas last winter and everyone had huge utility bills, I got worried. My bill was just over $80! I couldn't believe it. I've shown it to my family and friends and I recommend anyone who wants to lower their bill to do so! It's a bit bulky so find an outlet that is rarely used because it takes up the entire outlet, but it's definitely worth it!