Will somone kindly explain (in as much excruciating detail as possible

) the benefit of tuneboy starter kit vs. the price? Even $100 off list price for essentially a cable and program seems outrageous-there's no real hardware here right?
From another thread, someone (Rexxypup?) mentioned most of the cost comes from having a tune key that allows custom tune upload. Said poster also mentioned it's possible to buy a replica cable, download the program from the site and have some type of basic functionality at essentially the cost of the cable. What's the benefit of the custom tunekey feature vs. basic?
I'm curious to hear tuneboy owners if you feel the benefit was worth the price. What kind of performance increase did you see?
Stephenjpauls-thanks for posting the group buy info. I may be joining

Thanks!
-Scott