I've been using this cassette adapter for two months now and it makes my MP3 player sound as good as the cassette player itself. Be sure to adjust the volume on the player first (too high and it will distort) and then use the cassette player volume to set to your preference and it sounds great. I use it in both GM and Ford type cassette players and it works equally well in both. (follow the simple directions on changing the connection) It's an easy way to bridge the gap between your MP3 player (and other audio devices) and your cassette player.