T The QU4D allows you a lot more drive out of a board than a thruster, the speed you get out of them are awesome! You make sections you normally couldn’t make, allows you to take the perfect line on those steep hollow take offs that the thruster might twitch in the tail & lose abit of drive. The draw back I think would be the rail to rail turns because you haven’t got that centre fin, you don’t have that pivot point to turn off. I have been shaping quad fishes, quad shortboards & Quad guns & have received incredible feedback so if your keen for a different perspective of a wave & keep your surfin fresh order one now!!!