Seems to work well and saved us from living in a seemingly very desirable ground floor apartment which had a couple of power lines running directly under the floors of the bedrooms! The meter maxed out when positioned at certain places on the floor in these rooms... There is enough scientific evidence that long-term exposure to EMFS may be dangerous. No conspiracy theory needed. The principle of precaution fully applies. My local electricity provider states in one of its publications that "Without exception, these major reviews have reported that the body of data, as large as it is, does not demonstrate that exposure to power-frequency magnetic fields causes cancer or other health risks, although the possibility cannot be dismissed. Most reviews recommend further research, and, appropriately, research is ongoing worldwide." Yeah, I think I'll pass!