I must admit that when I ordered these screen protectors I wasn't expecting too much from them as the price was low. I couldn't have been more wrong, they exceeded my expectations in every way. They are actually big enough to cover the whole front of the iPod, not just the display area so offer greater protection than some I've seen (there is a gap for the button. They aren't thin, flimsy things so should last well - it should take me years to get through all twelve. They are don't affect either the colour or clarity of the display and best of all, the first one attached first time with no air bubbles left after a slight smoothing over.
Installation hint - don't use the provided card to smooth the protector on - use something wider like a credit card. Use this to press down on the protector from above while you peel away the bottom cover sheet, keeping the card moving at the same rate as you're moving the cover sheet.