I've used them and one of my buddys has used them for the last couple of years. They are not long distance broadheads for sure, of course you're aiming at the head/neck area only, so there's enough reason to keep the shots under 20 yards with them. They are very effective. Several things about them make them not so attractive to most guys. If practice with the broadheads, you will ruin the blades. They aren't very tough. Your arrow will need to be longer than your normal hunting arrows to get the blades out in front of the riser and you will need to also pay attention to the clearence under your sights. Having them in a normal quiver is tricky, you really got to be careful with those blades around your strings and cable.
What we have done in the past is get our longer arrows and put 125 field points on and practice to get sighted in for the set up. Then we take one or two shots with the guillitines to verify that they will impact at the same point as the field points do. We found that if you spin test them and if they don't spin true, they certainly won't fly true. So spin test them, if they don't spin true take them apart and try to move blades from one spot to another and re-assemble them and spin test them again. Once them spin true, they will fly like the field points do. We even use blazer vanes on our arrows. The 5" vanes might allow an arrow with a less than true broadhead fly better.
One thing is for certain, no tracking is necassary. You hit the turkey in the head or neck and you won't have any worrys about recovery.