I absolutely love my Tenacious, and eventually I plan on ordering the other three as funds become available. The QC is not quite up to normal Spyderco standards on some aspects, but they are still great knives. My tenacious has really bad blade centering, its way to one side. However, it does not effect its functionality, and it still locks up tight with a very thick liner lock.
As a newby
collector (my understanding of) The quality levels rank as follows
From Highest quality to lowest (relative)
Knives made in:
Golden, Colorado, Earth.
China (resilience, tenacious, persistance, ambitious, bugs and so on.)
As I said, I am a newby, this is just my personal experience with my own collection of spyders from all these countries. Im sure im missing something, and The Deacon is who probably has the most info on this subject (as usual). That being said, Taiwan and Japan are turning out some phenominal knives with un-paralleled quality.
China, as can be expected, trails a bit behind. However some of the best made Chinese products I have ever held had a