I have never used them but have two friends that have. I know the 2 blade ones are nasty and my buddy has killed a lot of deer with them. Huge hole and a kill even when shot placement wasn't the best.

They have both tried the 3 blade and have thrown them away. Real problems with opening. I'll see if I can get their video. Shot two deer with them two years ago and the head reflected off the deer, with only one bade opening. I heard this from both of them and also another guy that tried them. But as far as the 3 blade...they love them.