Well I don't remember flying off the bike or landing. When I came too the vest was inflated. The next day I wasn't sore besides for an elbow/hand and my leg that had stitches and some other minor cuts. I have the model that inflates in 0.12 seconds.
"All that is gold does not glitter,
Not all those who wander are lost;
The old that is strong does not wither,
Deep roots are not reached by the frost."
'12 690 Enduro
// 690 Wiki