I just got the Shell Shock: G-Class and it's the best iPod screen protector i've used yet. I had the clear screen protector on my last iPod, but it fell out of my lap as I was getting out of the car and cracked down the right side of the screen. The Shell Shock is scratch and shock proof and makes it impossible for bubbles to pop up on the screen.
I like the Shell Shock: G-Class. It's the best ipod screen protector i've used so far. It's scratch proof and shock proof. Cellairis made a video showing it against a stapler and another against a typewriter. Check out the video to see what i'm talking about. It's pretty amazing.