Sorry, a Zagg 'skin' isn't going to protect your Kindle when you drop it on concrete. Scratches, scuffs, sure. A drop? b.s. You need a case or cover for drop protection.
That'd be like saying a hood skirt on a car would prevent damage in a collision.
If someone just wants screen protection, the Zagg's are a total ripoff. For protection beyond that, just get a decent cover.