They are an excellent broadhead. The only thing about them I would be concerned about is that the little rubber o-ring that is part of the rear assembly of the head can get mashed out of shape. Especially with small diameter carbon arrows. This is however a minor potential problem and can be cured with the use of a little metal washer that NAP sells. I have used them before and wouldn' t hesitate to go back to them again. They along with Rocky Mountain Titaniums have the sharpest replaceable blades straight out of the box that I have encountered. They fly great and are not too hard on the pocketbook as well. As for the Pro Series version? Well to be honset I just don' t see any difference that justifies paying that much more money for them. They have grooves on the center ferule that is supposed to be of some benefit but I seriously doubt there is actually a bit of difference in the performance of the Pro Series heads.