I have wanted to get an Edge Juice w/Att. After doing some research, talking to sales reps at a performance store, and sending an email directly to Edge, I have given up. The customer service rep at Edge was really an idiot. Not only did he not answer my questions, but he couldn't even put a sentence together, or even spell correctly. I was really disappointed that somebody like that could change my outlook on the product so much.
I then talked to a salesman at 4WheelParts. I told him about my interactions with the Edge idiot. He said that he had an "in" at Edge. After he made a call, he told me "that the Juice w/Att was hit and miss with the 08 C&C 6.7L's. It works on some, but not all." That is what he was told by his "in" at Edge.
I am disappointed. Edge is a company that is close to my home.
I am holding out for a MP-8.