The Ped Egg

Saw an ad on TV today for something called the Ped Egg. I'm wondering if anyone has tried this and what you thought. It supposedly files dead skin off the rough, calloused areas of your feet. The lid on the unit even pops off so you can discard the "filings". I'm not sure what they mean when they show the translucent "Professional Model Shown" lettering on the screen twice during the ad.