yup I have, it is the only way to run a aftermarket HU correctly with the factory BOSE/CLARION amps, it rectifies the impedance/voltage differences between the HU and amps, doing a wiring hack is ok if you want to overdrive the amps and blow your brains out. I got mine direct from autoleads along with the standard non bose HU iso adapter, you will need both if you source from Autoleads, 5 minutes plug and play Perfect.
CLARION 505E