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.
"Everyone you meet is fighting a battle you know nothing about. Be kind, always."
KTM 525 XC-W // KTM 950 Adventure