Hey bud, good post. I apprecite your and other people's interest in the active safety features being offered.
A short disclaimer:
These systems only work at certian speeds, under specific driving conditions and if they should fail for any reason -- the car manufacturer has no obligation to the effect of these features.
Might they intervene and save your life? Absolutely.
Might they do nothing when you're relying on them?
Always possible.
Source: I am a car salesman.