The initial impression was quite rough. The cable can be buggy when connected to a phone (not necessarily Noble's fault). However, when everything functions properly, this is one of the most impressive and exciting IEMs at this price point in my opinion. The soundstage is very intimate (in a positive way), and the XM-1 has one of the most incredible 3D presentations I have ever experienced from an IEM without any software trickery activated (I hear details coming from left to right and front to center). If you listen to a lot of EDM, this could be your endgame. I would love to see this with a "normal" cable and a larger dynamic driver. The xMEMS technology is absolutely mind-bending. I ordered this open box, but I got a brand new unit from Musicteck instead! Thanks!