Review on Amana Aluminum Cutting Spiral Single by John Destruction

I'm a big fan of Amana products and the O'flute range always delivers a great one Finish quality, but be sure to start and go slow the first time you use it! It broke on my second use cutting polycarbonate, but since I'm not sure if my feeds and speeds are to blame I won't blame the bat. Why do the most expensive beats I buy always break? Murphys Law?