I used to shoot the muzzys and really like them. Last year I decided to try the two blade rages because I thought the new concept of them expanding from the back was awesome. I was hunting with a buddy and put a pretty good shot on a deer last year and he couldn't belive how well they work either. Of course the two inch diameter doesn't hurt. I took a picture of the heart and its literally looks like somebody took a sneak knife to it. Bottom line, retractable or fixed, if you put a good shot on, it really doesn't matter. Just shoot what you feel comfortable shooting.