The main reason I own a Magicshine (aside from this board recommending it) is an unfortunate encounter with a wayward rabbit at 4:30 a.m. on a commute which involved an endo, and not in a good way. I was using a CatEye EL320 at the time, and my accident made clear the need for more illumination. Magishine provides that. If I am anywhere on my ride at dusk, dawn, or dark, I mount the 'Shine. Absolutely a necessity, based on practical (and painful) experience.