Don't get rid of your car cassette deck if it is still working. I was hesistant when I thought of buying this cassette adaptor as to the quality of the sound. But I was wrong. For me, the sound quality is better than my installed 6 disc cd changer in the trunk that uses FM frequency to link to my car audio system. The highs and lows are definitely there. My cassette deck (made by Pioneer) on my BMW even recognizes the adaptor as a metal tape. I have to activate the dolby system as the higher frequency can be ear piercing.I definitely would recommend this updgrade if your car cassette system sounds good or if you don't want to spend big bucks but still want to use your mp3 player in your car systems. Thanks Overstock for the great value and low shipping cost. Keep it up!