I've been using the NAP Gobblergetters for several yrs now. They work great. They're basically a Nap Spitfire with a blunt tip, and little longer blades. The thing some don't seem to realize is a turkey can sometimes fly off after a pass thru hit. This can obviously be a problem on finding the bird. The Gobblergetters are designed to slow penetration, and keep the arrow in the bird. This prevents fly-off. They've worked to perfection for me thus far.
I'm not really a fan of the Gullotines. Something just bothers me with the concept of shooting a arrowat a turkeys head to cut him, and possibly take his head off. Archerys never been about shooting at the head, its always been about hitting the vital area. Plus the length of the blades could be illegal in some states. But thats just my opinion.