My I/O's are awesome, comfy, look great, easy to change lenses if the weather packs in, and fit pretty well with the few helmets I've owned. the crowbar didn't fit my face at all, it kept sliding up my nose, which i was pretty gutted about because I've always loved the way they look. my brother now owns some crowbars though, and would never wear anything else, he found they fitted awkwardly with some helmets but to be honest go with whatever fits your face best.