Have you ever been listening to your system and the lights go out? It's not a good feeling because there is always the risk that when the power comes back on that something will be amiss. I've used power line conditioners for almost 20 years but our experience with Hurricane Sandy here on the Shore was not a good one. My wife thinks that I missed my calling as a Weather Channel talking head because I'd scare the living crap out of everyone with my forecasts, but I had a bad feeling about Sandy with our home only blocks from the ocean and so many trees surrounding our property.