Very good materials, very good construction, but at least for Sony UWP-D the thread of the locking nut is a bit too long.
Even when fully screwed in, while the threaded nut does not move one bit, the part with the plug may rotate freely in the jack and may move in and out by about half a millimeter. The jack of the original Sony UWP microphones does not move or rotate when the thread is fully screwed.
I cannot comment about Sennheiser, maybe they have better compatibility there, but for Sony UWP bodypacks this is less than ideal.