I have been looking for a good aux cord to use in the car for a while now, finding many too large, or too small, but this one does nicely! The rubber holder included allows you to basically create an adjustable cinch to make it smaller or larger at will, which I do on a daily basis. Sounds great, I could tell a difference from my older, shoddier cable immediately. It actually clicks into place too, I find which is kind of nice, and not too strong a hold.
It seems sturdy, a few weeks in and I expect it to hold up for quite some time. A great buy for me!