There is a one year warranty on the Interceptors and I have had exactly 2 fail (well one, the other melted on the exhaust pipe) in the four plus years I've been using them. The Interceptor IS designed to increase the shift firmness both up AND down and if IT is set improperly, can damage the transmission hard parts. "More and more Interceptor failures popping up on various forums" - must be like the VX becoming a collector's item rumors - I hear it all over the web!