I was a little worried when buying this item because of the negative reviews, but the price was right ($5.99).I'm happy to say that this adapter has only failed to function once. We use it in our car and it did exactly as some other reviewers described: reversed direction and began auto-rewind. This happened on the first cold day of the coming fall in New England and my conclusion at the time was that caused the problem. Since then it has never failed to play and never stopped and tried to rewind, even though the days have gotten colder.The sound is adequate for most non-name brand car stereos. I've noticed no difference between this and the previous "Monster" brand adapter that died.I would buy this product again given the low price. I will also keep this review updated if it fails.*UPDATE*It's still running perfectly after almost two years of use. We keep it in the car all the time and it is exposed to hot summers and freezing winters. This is a good product and I would buy it again if I needed to.