I tested the vectrix,guardian,and the drenalin(at the time i could not find a cardiac to try)I chose the drenalin.I loved the feel of the bow in my hand .The draw cycle seemed much smoother than the guardian,and the hoyt ehh nuff said.The dren actualy chronos faster than the stated ibo.I added a New camo sts just cause i like toys! didnt need it but now yah can barely feel any shock nor noise.