The breakout cable is essential, as it's the only way to plugin an electric guitar, a bass or an external microphone (if you don' want to use ONE internal mic). The plugs are very solid and heavy, so, if you are used to hold the ONE in vertical position using the mic mount, they will put a strain on the cables and the connector you plug into the ONE port that is located on the upper part of the soundcard. So it's not difficult to predict that, sooner or later, I will have to replace it. I was very happy to find it at Thomann (without ordering in the USA, with duty taxes, very long shipment times, etc). It is exactly the same as the one who shipped with the interface. Now I can use the ONE without the nightmare of breaking the breakout and have it unusable.