Not sure why there are so many negative reviews. Perhaps people bought this thinking it was something else, or is meant to be used for a different application.
I bought mine months ago and it has been just great. I've been using it to connect my iPod to the AUX interface on my car radio (via a SendStation PocketDock) and it couldn't be better. Ideal length (0.5m), so there isn't excess cable trailing around.
Addition from April 2012:
As luck (or lack of it) would have it, the day after I wrote the above review the damned thing bust. I noticed that only one channel was coming through my car speakers and when I got home I could see that one of the soldered connections had come adrift. Not best pleased and the lead is now on its way to the bin.