I used them last yeat. Got 2 deer with them. One went 40 yds and the other walked 2 steps then plopped over.
Make sure the screws are tight. I used a small screw driver out of a glasses kit and took all the blades off to sharpen and some of them were not very tight at all.
I missed a couple times and the blades were not dulled at all either. Could use the rubber bands over and over cuz they just roll down the arrow too.