I've had mine for about 3 yrs. Still as sharp as day one.
These are great for larger ring gauges. I use mine for everything, including Nub 466s
With guillotines and scissors, I would experience pinched caps, on the 466s. The V shape cut is always clean and uniform.
Coming from a Xikar double blade, I didn't think that a single edge would be as precise. But the added girth of the Colibri also helps with the cutting action