The FIC is infinitely better than the SSAFC as you can actually see what is going on with your car, most importantly, injector duty cycle. Anyone who thinks our cars have "fuel cut" would benefit from an FIC. I learned thousands of dollars worth of information from the few months I owned the FIC. Yes, I sold it, but that's because there is no possible way to make our cars run to the perfection I require with a piggyback. No piggypack can predict when a PCM will switch from open to closed loop, and I've posted more than a few times what those situations are.
I've decided to work the MSP a little longer, and I might be able to create a "piggyback" that actually works, and works better than any factory system because OEM's are crazy cheap and aftermarket tuners are crazy stupid.
I'll definitely keep the faithful informed if I come up with anything useful.