I have one. Stage 1 is nothing special. Car pulls a bit harder up top since boost doesnt taper as badly, but that was the only difference I could feel on the butt dyno. It seems to be hit or miss. Some people claim to feel a big difference, and others say that stage 1 is nothing. It seems that stage 2 puts a smile on everyones face though.

Is it worth $600? If youre going to stay at stage 1, no. The power gains just werent there for me to justify it. But I plan on adding more parts, so I wanted an EM system in place first that could help me take advantage of them. The AP fit the bill perfectly cause I can run on their OTS maps until Ive got enough parts to warrant a custom tune.