I started looking for a new cassette adapter for my car today since the past couple weeks I noticed the sound is only working on the left side of my car. I started to realize that this was only because the cord had become worn near the 3.5mm jack, which makes sense after almost 5 years of use! While searching for other products, I came across this page and amazon alerted me that I purchased this product in February 2007. WOW! $10 well spent! This cassette adapter lived in my tape deck for so long and worked great! There were a couple times I had to rewind the device or take it out and put it back it, but 95% of the time this product gave me absolutely no hassle, and great sound. For best sound quality, don't turn your mp3 player up to the max but you can turn up the car stereo controls loud and you'll get great sound. I love this product and am extremely hesitant to try another brand after having had so much great use out of this item for so long.