I have a 5G white 60 gig iPod.
Putting an invisibleshield on it was the best decision I've ever made. If I ever order another iPod, I'm not taking it out of the box untill my invisibleshield gets here.
Julia (my Pod) had hairline scratches on the screen, but I decided to just live with them, and put the invisibleshield on over them. To my suprise, you can no longer see any of the scratches. I don't know if its because the adhesive fills them in or what, but I couldn't be happier.
The only problem that I've noticed, its that its a lot harder to put it in and take it out of the supplied case. The invisibleshield is still glossy and nice looking, but its not a slick as the original finish, and I think taht might be the problem. But, since it's a 60 gig, it didn't fit in there too well to begin with, and no that its protected by the invisibleshield, I don't need the protection anyway.
I'd highly recommend this product to anyone who cares about the condition of their electronics.