I just bought the Cobra Amp today at Dicks and was blown away. Now I haven't hit tons of drivers but this sucker launched the ball and it felt so good. Now I also modified my setup with the driver today after watching a video on youtube. My drives were right down the fairway [or not far to the right] and distance was excellent.
I even like the sound it makes, my Nike Sumo sounded like I was hitting the ball with a iron skillet.