I bought a TM Superquad that had the By-you 65s already installed so I figured I would give it a couple months to rate it verse hit it bad and pull it. I load my swing pretty hard and was playing a UST PF 75 X in my previous driver. This shaft seems extremely whippy and loose for my type of swing. If I swing about 75% It works excellent but Im not wired to swing this way. I would rate this good for a player that really has a tempo swing if your getting after it stay away..