I was one of the people that had the problem with the 12V interfering with my sat radio. Sebastien did fix it, however, there is still a pretty loud interference noise coming from the alternator and through the speakers and I don't know why. I have to keep the volume level on my sat radio pretty low and turn my HU volume up to 30-35 to listen to it. If I turn my sat radio volume up past the halfway point or so my speakers start popping. Apparently I am in the minority though. This means that my music has very little bass and I can't turn up songs that I like really loud. Sebastien did fix it free of charge, but it's still not perfect. It works great with an ipod though!