Im not gonna say that it IS just a marketing tool cause im not a engineer or anything BUT it just came out either the end of 07 or the first part of 08. Look at all the deer that have been killed using the old ones. I look at it like this. If you practice from an elevated position and you use your range finder and you dial in your bow at 15 yrds. Will there really be a diff when your elevated in a treestand and your rangefinder tells you that the deer is 15 yrds away? now, that said, is there a diff between ground trajectory and elevated trajectory? sure! but is 20 feet up enough elevation to make a diff of more then a inch. I personally have not been able to find a difference. I am sure there are people on here that will swear by it. Everyone has their own opinion and thats fine, but their are people swearing that the Rage broadhead is the best, then how do thousands of people every year kill deer with muzzy's? get where im going with this? there are tons of people that will tell you that one is better then the other but as long as your buying quality, its really up to you.