My main gripe with the Copperhead was that it required that USB legacy support be turned off in the motherboard BIOS, otherwise the mouse wouldn't be detected without unplugging/replugging it. (Not even the latest firmware, which supposedly turned the button underneath into a 'reboot' button solved allowed the mouse to be detected without being unplugged first.)
This in itself is not a major problem, but in my specific circumstance, I dual-boot XP 32 and XP 64, and I use a Logitech G15. For some reason, unless USB legacy support is enabled, the G15 will not respond during the 30 second time interval where I am supposed to choose the OS to boot.
So my question in a nutshell is this: did you have any driver/BIOS issues to speak of?