I posted about this issue on the Sundara thread, but I purchased a Hart Audio Cable and love the quality. I do agree with
Kazzaaa that tangling is a bit of an issue, but not too bad. They are light, very very flexible, and not microphonic despite having a cloth/paracord cable sheathing.
But, I did notice the left channel would cut out briefly on my Sundara every few hours or so. At first I thought it was the headphone, so I switched the L/R channel inputs and noticed it on the right. Then, fairly convinced it was the cable that was the issue, I inspected it and found a slight bend on the left plug. I received these two weeks ago and seriously doubt this was my doing (these are very sturdy plugs and I treat my stuff pretty carefully). I've e-mailed Hart Audio about this, and I guess I'll find out how they handle these issues?
Just something to keep in mind though. I suppose smaller shops might be prone to more quality control issues? These cables look and function excellently though, totally recommended otherwise.