This seems like a great idea for the average user. It seems like, for someone like me with no knowledge of tuning at all, it would be absolutely great way to gain a bit of power. And if it could net even 10 horsepower for the average user, it would be well worth it. Not only that, but any modification you'd do to the Rx8, you could reflash for even better power.
This is what, a $700 piece? That is an extremely good deal if you ask me.