Well, you call it a "...middle of the road option...", and then "It's also like a piggyback..." That will most likely confuse the reader who has no knowledge of any of them.
It's no different than APR/UM/Uni/etc. It's like those and better is what you should say - because you can do it in the comfort of your own garage (with several other benefits such as having a scan tool and meter). But in the end, it's a full on flash tune just like APR and the like. You should list Cobb and Unitronic, and Eurodyne, and the others that can - as tunes that have the option to buy the tool to do it yourself and not rely on driving to a dealer.