I just ordered a few at first to see what they are like and the quality really has really surprised me. There are other speakon connectors on ebay where I can tell by the pictures they are crap..... I have been and still are sceptical with stuff from China, but even my Vectron inverter/battery charger, (which are regarded as the best in Maritime environments and often used in ambulances and other critical stuff) is now made in China (Sweden before) as are many/most(?) amps and drivers.
Neutric's county of origin is Liechtenstein, a tax haven where they probably produce nothing more then stickers. I can't find anything about where they are made, and it would not surprise me they come from china as well.
I only have some very old original neutric sockets to compare to and they look, feel and thus far seem to be of the same quality.
I will report any failures; I have about 50 of both of them now and just ordered a few more.
//edit: I have cabled computers and server rooms in the past and have in comparison not much experience with audio, but I never broke any connector other that it was calculated/expected

or while putting a connector on a cable. Is just use stuff where it is made for and have no problems with pulling a straight powercable at its cable from a socket, but don't do this with an angled one, a RJ45/network or speakon connector, because they are not designed for that.
If others buy them, please report your experiences here.