When the failure rate gets to zero let me know. I have had 2 mustangs and both have ended up in the garbage. The first one, this was before HIT technology hit the market, went off while I was running. It was just after a summer time thunderstorm so everything was wet and the humidity was high. Scared the crap out of me when it went off. The second was probably the second generation of HIT. It was getting close to the expiration date and my son wanted to see how it worked. I strapped it on him and off the dock he went. The vest did go off but only inflated to 1/4 to 3/8s its volume. It was not enough to hold my son's head above water. I only run solid vests now. I have one of the Mustang Accel 100 MPH vests and one of BPS good vests. I am think of replacing the BPS with one like mikesxpress is running. Even down to the EPRB.