I have other BT earphones with more conventional cable lengths, but I find that the additional slack of the BeatsX makes them more comfortable to wear since the earbuds are less prone to be pulled when moving your head, and they also seem to rub less against shirt collars and the like. I have experienced very little cable noise with them so far. I haven't tried them for running though.
The long cable probably also helps to keep them in place when you're wearing them around your neck while not using them (being able to do that is one of the main reasons why I like them, since you can simply wear them all day under your shirt/sweater without having to put a case somewhere).