Maybe they work great, but i remain skeptical....especially since it looks like screwing a swiss army knife onto the end of your arrow. they must have felt like they absolutely had to put something new out this year and this is the best they could do on short notice. I thought they would have gone with a 4 blade hybrid (2 fixed and 2 expandable), since they finally ironed all the kinks out of their 2 blade design (hypodermic).