I bought one for my husband for Christmas. First of all, we immediately discovered that we had to purchase an additional jack adaptor to make the iPod function of his iPhone work, even though it was advertised as being "compatible" with the iPhone. Secondly, I purchased the transmitter on 12/20 and it's already not working, even as just a charger. Tried it in several different cars to make sure it wasn't a cigarette lighter problem, and it wasn't. The indicator light doesn't even light. I've requested a replacement, so I'm hoping that my request is honored and that the replacement works.