I would recommend buying the product but return it if you experience the line noise.

This adapter caused line noise while it was plugged in, defeating the purpose of listening while charging since the line noise was very noticible

Line noise is a factor of many things.

I couldn't even charge the iPod while listening to the radio because it also caused line noise in the AM band

I have other cigarette lighter accessories and none of them cause line noise

This adapter caused line noise while it was plugged in, defeating the purpose of listening while charging since the line noise was very noticible

We have been fortunate and have had no line noise problems in 4-6 cars nor any problems with the durability of the product.