PLA is not good for gears. It would work if the speeds and loads are low.
in other words, if it's not generating heat through friction - it's pretty good. Which is what i said.

Just opened the packet of armadillo, with new filaments I always cut a small piece and bend it back and forth untill it breaks.
After a couple minutes of strenuous bending. No break, the filament has developed a very slight waist. But that's it. No colour change.
In appearance it looks and feels like pla, stiff and shiny. If it prints as well as they claim (so far in 3 years, only innofill's pro1 has ever done that) this stuff could be amazing.