I have one on my drenalin and it is sweet. They reduce the torque on the bow because they are so much narrower than the mathews grips. I have always loved the way the mathews shoots just can't stand there fat grips. Putting a torque less grip on helps dramaticly at least with me because i have small hands. They also have a deeper throat on the grip compared to the nonexistant one on a production mathews grip, this seems to help get a more consistant placement of the hand every time you grab the bow. Finally you can decide what grip you want low, medium or high. If someone can make the images smaller for me I have some pics that compare the two side by side.
Jeff