According to the guy at Durametric, it's a fake, manufactured outside the US. The software is legit, but an early version from Jan 2007. It's not a huge problem for someone like me with an older car, but someone with a newer car would be pretty much hooped. I can read and reset error codes, reset the check engine and airbag light - most of the main stuff that I would need the tool for.
Here's the version history from Durametric if you wanted a more detailed answer.
http://www.durametric.com/versionhistory.aspx
It was kind of embarrasing going to Durametric tech support for help and being told that they couldn't help me because it was a counterfeit cable, but I apologized for the trouble and they agreed not to send their jack-booted thugs to kick in my door at 3 am.
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