The thing about the PC3 is that every time you put something new on the bike, you have to (or should imo) get a re-tune for the best power outcome after throwing the new stuff on there... that's basically why I was saying that this system would pay for itself over time. I doubt reliability is an issue in these things due to the fact that they work with the ECU on the motorcycle that carries safeguards for the motor just in case something did go horribly wrong on your tuning apparatus. About the traction control, I don't know much about it w/ the bazzaz because I haven't researched it much... however, one would assume that if the back tire starts to spin and it has any type of control on rear tire spin, anything helps. Is it worth an extra 300 dollars for the top model w/ the traction control? I wouldn't pay for it... not now at least, not until I heard from actual users and reliable sources that it was worth a damn. Once I had that proof, I'd scoop it up for my bike/leathers/skin/everything sake.