I used mine for about 2 months after i got my iPod. I only stopped because better cases were starting to come out, and it was getting really dirty and the sides were starting to come apart at the top and bottom.
But, I am definetly glad that it was included with the iPod, because there is always a delay between the release of a new iPod, and the release of new cases, so my iPod would be a lot much more scratched up without it.