They are totally legit. I got an SCT X4 from them pre-loaded with a few different octane tunes. The difference in throttle response alone made it worth every penny. You won't be disappointed.

How do you even start that argument? Each book has its own world, so the rules from one just don't apply. It sounds like a quick way to talk past each other.

My cheap LED shop light from the hardware store did more for my mint than any fancy grow light ever did.