Does anyone have any experience with this product. since i almost bought the $700 jake brake on e-bay, i figured i would research exhaust brakes a little more. if i am reading the web site correctly, you mount it downstreamin the exhauxt it uses an electric solenoid to activate the butterfly. I like this a lot beteer than mounting a compressor. what i don't like about it is mounting it under the vehicle and the micro switch under the accelerator.