I always get asked that question on here.

I used to shoot the Muzzy, but last season, I wanted to try a mechanical. The only one that caught my attention was the Snypers. The blades coming back and out mean less penetration loss. I took a doe last year with them with excellent results. The only thing about the originals I didn't like was the tip. They changed that this year with the XP3. I figured I'd have better bone perfermance in case my shot wasn't exactly perfect. Thank goodness I used them this year. I seriously doubt I would have killed that buck with the originals.
I still like the Muzzy, and would never hesitate to use them. But for now, i'm very please with the XP3's.
I too don't understand the hunting shows shot placement a lot of times. Way too close to the shouldar region. Like one person here said, stay back away from the shoulder a little bit gives more wiggle room.