a friend of mine has been driving with his daily for well over a year with no problems. If the solenoid were to fail, it fails in the open position, allowing full use of the brakes. I have seen at the track where a guy pushed the button to engage the line lock, and something happened causing the lock to stay closed. They had to open the brake line to relieve pressure enough for the car to move. But that only happened when he was using it. Unless you use it on the street, that shouldn't happen.

 

I know people running around with them with no problems. Just make sure to take it off before you try and launch.