Even, predictable flight. Easy, steady takeoffs. And super smooth turns. The larger size imparts a more balanced flight behavior at all speeds. The dihedral curvature lets you tilt the foil into turns like a skateboard for a smoother cruising behavior. Gybes, tacks, 360s, and transitions are much easier since you can feel your back wing and use it to pivot the foil.
A high-quality lightweight carbon and PU foam construction is more complex to build than a pure carbon wing but the weight savings is worth it.