Connections are snug and secure. There is no perceived loss of audio quality. It's great that I can now use all my 2 pin cables with my mmcx items!
If you have an occasional need for them, it is nice to have them on hand. They fit nice and tight.
Pricey but works as advertised.
Perfect to use with my mmcx cables! Work as plan and not really bulky which I was worried about. Sounds as aspected.
Need to test the polarity for sure, but generally easy to use and pretty tight.