I jumped one of the prototypes a while back and was pretty impressed. It looks a lot like the Z-1, but has a velcro strap tightening mechanism similar to the Oxygen.
I currently jump a Z-1 and have had nothing but problems with the customer service. The US dealer was more helpful, but only after I tried to reach parasport for months.
The headfirst customer service was awesome. I emailed and got responses right away. Nick wanted me to put a few jumps on the proto and let him know what I thought. I made a few comments which were supposedly incorporated into the newest proto that I should be receiving shortly. The one I jumped needed a bit of finishing work, but I assume that was just because it wasn't the final version
All in all I liked the helmet a lot.
As far as it being legal, I don't know and I don't care. If the people at parasport don't want to support their customers, then someone else will.
-OK