I've not seen the SCARS tapes, nor do I want to. I've seen SAFTA 1, and it doesn't begin to cut it. Why?
1) People differ in size, strength, clothing, and body composition (this goes for the GG as well as the BG), and the idea that the same strike to the same place will elicit the identical reaction regardless of who you're fighting is nonsense.
2) SAFTA puts you into McDojo-style deep stances which are highly stable and highly immobile, the last thing you want on the street.
3) SAFTA also likes to hit high-low or low-high, whipsawing the BG around the room. This is a fine approach in some circumstances, but when the BG's almost bent over backwards, why hit him to bring him forward again instead of piledriving his head backwards into the concrete?
SAFTA is the most egregious waste of $80 there is. Thankfully a friend loaned it to me to evaluate--the only hard thing was telling him afterward how badly he'd spent his money.