Forgot to mention that the sun visor is/was quite useful, but on all my helmets now I put about 5cm of matt black electrical tape VERY neatly across the top of the visor. This totally blocks out the sun and literally transforms riding in low sun or on bright summer days. There is no down side to this mod, if done well it almost looks stock. The narrow tape can be curved vert neatly to the shape of the visor.
This mod by far exceeds the usefulness of the drop down tinted visor.