They likely shot them or had somebody else shoot them, out of an un-tuned bow and they flew all over the place. Mechanicals can mask bad tunes and cause their own issues, but many think they shoot better because of that. This is true, but a bandaid for the real issue.
They are a great head and will out penetrate nearly all mechanicals in most cases.
I always try to tune my bow with the biggest/nastiest head I can find or tune it with out any fletches and a field point (bareshaft tune).
Once you do that you can shoot any head efficiently-mechanical or otherwise
Sharp and accurate kills no matter the head :way: