I haven't used a hypershock but last season I did a bunch of setup changes mid stream testing mechanicals. My first buck got hit by a spitfire (64lbs. draw @ 18 yards) and flat opened him up. The shot was across the chest and double lung and the ribs involved were blasted away. The arrow passed thru both sides but didn't exit the body and was broken all to hell (three pieces). I shot a doe with a shockwave with very similar results (teo pieces). In both cases the blood trail was nothing short of fantastic. Not one of those "here is a drip of blood" and then look for the next spot. More like "Here is a puddle and then look up another 5 yards and there was another puddle". I always perfer to have a full pass through so I can look at the arrow stuck in the ground with my binoculars while waiting to get down and track. Thus, Thunderheads for me. I think any drawback to the whole mechanical concept is the loss of arrow velosity as it passes through and hits the other side. I'm positive others have shot all the way through many, many times but I never did last year.