Crowbars are great, you shouldn't not get them because everyone has them. Not to say there aren't other reasons you'd rather get a different goggle.I have heard great things about i/os though, especially the lens changing system, but like the other guy said, I read reviews that peoples eyes get dry or start watering because they let a lot of air in under the nose. I have crowbars(seth morrison pros, pretty much guarenteed to see gapers who think they can huck 50 ft fronties just cus they have the goggles), and they are dope goggles. The outriggers help the goggle fit good all the time, especially with helmets. Also, try them on if you haven;t already. The fit can be the tie breaker.