I have Debix. I live in CT, and 2 years ago a state employee's laptop was stolen that had thousands of CT residents' tax information on it, so the state has been providing it to everyone for free as a safeguard.
It's kind of a pain, but I really do think it'd prevent my identity from being stolen. Every time I have applied for credit since I've had the service, the applications have been put on hold pending verification. Usually within a day or 2, I'll get an automated call from Debix where I have to enter a pin #, and then they make me say a few short phrases to see if my voice matches recordings of my voice that they have on file. Nothing can be opened on my SSN until this verification takes place.
When I say it's a pain, its because there have been a few times where it has caused problems in opening credit accounts for myself. For example, it took me a couple days to open an AT&T account for a new phone. Another that comes to mind is one time I was at Circuit City purchasing a $1500 tv and they said 'If you open a CCity card, you'll save 15%,' so I said sure...thinking I'd be able to save $175. Because of Debix, the application came back as 'customer can't be instantly appoved,' and I was unable to get the savings.