The I/Os are great goggles. One big advantage they have over a lot of the oversized goggles is that they tend to work better with most helmets. They have a much better field of vision than a standard goggle, but they still don't have the FOV of something like the Fishbowl. When I put on my Fishbowls, I have to really strain my eyes to actually be able to see the frame. It's literally like you're a goldfish in a fishbowl looking out.