The look pretty sick.
I'm wondering if they are worth the extra 50 bucks over a Good pair of goggles.
They do look pretty damned nice...but that's not the appeal. You really have to use them to appreciate them. Optical quality lenses, no distortion. I actually forget I have them on sometimes because they're so good at adjusting to the light conditions. And they're fog free, for real. Zeal claims their fog proof or something, and they really are.
Also, my SPPX's came with a coupon for $100 towards a pair of Zeal sunglasses. Don't know if that deal is still going on, but worth looking into. Overall I'd say yes, they're worth the extra money. But then you become all freaked out about losing them or scratching them, etc, because you paid so much. Priorities.