Has anyone used Phone Guard?

[londonstylz]

I saw an app on my local (Clearwater, FL) news that uses the gps on your phone so when you are driving the phone replies to any texts or calls saying "im driving right now" and locks the screen. The name of the app is phone guard. I was wondering if anyone has used this app if so does it work well? here is a link to the websitehttp://www.drivesafeusa1.com/index.cfm?id=42652
and here is a link to the news story http://www.myfoxtampabay.com/dpp/news/seen_on_tv/anti-texting-device-documentary-sotv-030911