well I have been looking around for programmers and a guy named Willie Lynch from Sniper suggested I try the Sniper interface....well the price was the same as the SCT XCal2 but they had a package called the Special Forces tuning software that would tune two cars for the price of one. So I thought hell yeah, y not, My g/f and I both have GTs, so I bought one. The interface is unreal and fairly easy to use, I recommend it to anyone who wants more power for their car and save money doing it. The best thing about the whole situation is that that guy Willie Lynch from Sniper, I mentioned earlier, really knows what he's doing, no questions asked. He is one hell of a sellsmen and the tuner is the best mod i have bought so far...good work Willie and guys at Sniper