Joke all you want, but a recent experience with poor power in my house has made me a believer of conditioners: When I first installed my 950/7100, I noticed the lights would dim on every power-up. Obviously a temporary power dip on an overloaded circuit. This was acceptable until I hooked up my $5000 Infocus projector into a different outlet (but on the same circuit). Long story short, the first system use and the projector no longer worked. A trip to Infocus to replace a power circuit board and lamp controller and then back home, now hooked up to a power conditioner with many uses and no problems. No dips in the lights anymore either. Now I wouldn't hook up a single component without the insurance. There is no substitute for good clean power.