I have used them for the last several years(ever since they came out),I have taken 6 deer and they worked great. open on impact and made a large exit great bloon trail.
I use the 100 grain 3 blade. I always open and close mine several times to make sure they are OK.

Give them a try,I think you gonea like them.

I am not a hunter I am a whitetail population reduction specialest

remember keep your back to the sun, your knife sharp, and your powder dry.