I agree, WAY,....over priced.
The "self learn" is a trial to make tuning easier, but what I hear from engine builders and seasoned vets of the old school guys, is, they don't have the system worked out yet, as they still have problems to be worked out. That's why so many give up and go back to carbs.
My father had a friend that was a carb extreme pro. I remember watching him in his garage tuning with a vacuum gauge and more important, his ears, on his 12 cylinder,....... Jag. Amazing to watch and listen. Every spark plug were the same grayish color. Not rich, not lean, just right.
I love all the old gassers that had the stacks sticking out of the hood a foot tall.