I like the product but I installed it on 09/14/2015 and 09/25/2015. One of the cut-outs is defective and cannot be opened. I hear the servo motor turn on, but the blade won't open. Let's see how Revain & Pertronix handle it. Real guarantee check. 09/30/15 Revain has an amazing return policy so I got a brand new unit. Let's see how long the product lasts!