Bought these to replace an old pair of the first gen I/Os and they are a definite step up. I loved the original's ability to swap lenses on the fly to adapt to changing light conditions, but it was a bit of a hassle to make it happen. Now with the mag lenses, it's crazy simple to just pop off the low light lens and slap on a bright light one when the sun comes out! Plus the ChromaPop makes everything really, well, pop. It won't magically make flat light snow conditions go away, but it does help by enhancing contrast and color quite a bit. The spherical lenses really do cut distortion too. I live and do most of my riding in Alaska, where light conditions can change pretty quickly so these features are amazing. I'm supposed to list things I don't like in this review as well, but it's tough because to me there aren't any - I loved my first gen I/Os and these are a big improvement!