They are a nice cosmetic detail (visual aid comment is good), should do no sonic harm - possibly some tiny bit of good. I never expected to hear a difference and they didn't provide any. Usually the backside of audio gear sucks both from a RFI design and looks point of view. For me, it's more like the satisfaction I get in detailing something own to make it look just a lttle better and more mine. Hey, I love detailing my car too. These are impluse expendatures - like candy - too much is bad for you.
