I'm a Kindle virgin and had no idea exactly what these "skins" were, so I asked someone to get this one for me as a gift. I'm certainly not disappointed -- they're as pretty as they look. In case anyone's wondering at all, they are two large vinyl stickers (tough stickers). One goes on the front of your Kindle and one goes on the back, with holes for where the buttons go. They're called gelaskins, so you may be forgiven for thinking they have a gel-like feel -- you'd be wrong, they don't. The stickers are thin, hard and smooth.
The edges of your Kindle will not be protected with these skins (but I already suspected that and got myself a neoprene cover as well), but they will protect the front and back from any minor scuffs and fingerprints.
On a final note, there is nothing to cover the screen, so if you're worried about that, you'll have to get a separate case or a screen cover.
I gave it four stars, because I feel it's a little overpriced for what it is. Having said that, once I've worn this one out (which I'm hoping won't be for at least two years -- I've no idea how long these skins are supposed to last), I think I would get another.