I purchased this for my fiance for Christmas to use her MP3 player (Apple ipod Nano 3rd generation) in her car. We attempted to use it for the first time today and with either the ipod, or my iphone 3G, you lose half the sound with the plug seated entirely into the device. In order to get full sound the plug must be part way out of the socket causing the device to pause every time it moves because the plug comes out of the socket. I looked at numerous devices, and chose this one based on customer feedback ratings, and I am highly disappointed with it. This is one instance where trying to go with the higher cost, higher quality, name brand product has not paid off.