Passing the buck on to Chinese manufacturing is out of order in my opinion.
My W60 (made in China) had to be replaced due to sound cutting out in left ear. In my opinion this was a result of the loose cable connectors that Westone were using up until recently ... a design flaw rather than a manufacturing flaw I would say.
My UM Pro 50 (which Westone claim are made in Colorado) had to be replaced 3 TIMES within the first 8 months of owning them. Twice this was due to cable issues and once because the brand new replacement they sent me had a rattling sound inside it as soon as I received it.
In my opinion nearly all of these problems have been down to Westone's poor implementation of the MMCX connectors ... a design and material issue rather than manufacturing.
My UM Pro 50 and W60 now have much tighter MMCX cable connectors, which seems to have fixed the issues, but it appears to my eyes that Westone have taken a step backwards with the implementation of MMCX connectors on the new W80. They may include ALO cables but what's going on with that great big gap and exposed connection between the male and female MMCX connectors? I won't be at all surprised if people are having issues with the W80 within a few months of their release.
Despite having purchased all previous Westone top tier IEMs in the past, I'm not in the least bit excited by the new W80 and unsure if I will ever buy Westone again. They make the most comfortable universals I've come across, and they usually sound amazing, but they need to rebuild their reputation for build quality (and premium finish) and there's quite a way to go before they convince me of trying another of their products.