They are pricey, but man, I have yet to see a quality arrow that good. I was tuning another mans bow and he had them, and I shot all 12 thru paper, and rotated them 120 degrees and still got the same bullet hole. Rotated again 120degrees again, all 12 perfect.Usually, out of 12 arrows, I find 60-70% that have consistent spine. Thats with beman, carbon express, and others.

But I do understand, as I haven't purchased them either.