I agree that one failure does not make them all useless, BUT:
(a) i have never had a single tube fail due to manufacturing defect in all of my life
(b) there are further details that I will share below, that, for me at this price point, mean a return of all.
Just for those who might not realise - these tubes are GBP40 EACH.
The tube held pressure whilst bike unused for two days. First ride on smooth dry roads the seam clearly developed a leak after 5 miles. The tyre is perfect, and under eyeglass examination has no damage (so I have been careful not to denounce it for an unrelated fault).
It is well known that these tubes were very subject to QC issues early on, but I thought this had been resolved - so I have already taken a balanced view on them - and not categorised them as useless without looking, reading up, buying the things and trying them out.
Also, I'd comment:
1. The weld is quite bulky, at least on two of the ones I have (including the failed one). So, if you got a puncture very close to the weld, I doubt you could patch it
2. On my heavy thick 4 Seasons tyres, you couldn't 'feel' the bulk of the weld, but I wonder on thinner racier tyres if you might. However, this is just an opinion I accept.
3. The replacement Eclipse tube I installed when fixing the failure resulted in the tyre profile having a very noticeable 'pinch' in it by the valve. On this tube, when inflated , the valve must have been distorting the shape of the tube suggesting where it was pressed into the tube it had affected the 'roundness' of the tube.
As always YMMV, but this is not an ultra-thin race tube that I'm criticising for failing when I subjected it to unreasonable demands.
Am I intolerant of product failure - yes probably more than the 'average'. However, they're VERY expensive, and so they need to work. 100%.
So, all in all, not for me.