This onezie is amazing. I have one in a Medium in red with green zippers, and it is like nothing else I've ever worn.
It is impenetrable for storm skiing. If you're after free refills, it will never let you down. Ever. Layering is key but this suit will adapt t anything, I have had it in subzero temps with a full highpile fleece suit underneath, and I've skinned in it in much warmer temps with no real complaints. The beauty is that while skinning, I just wear a baseayer underneath and unzip everything and it almost feels like you're skinning naked,but when you get to the top- zip, zip, zip- competely sealed in.
As far as pow goes, this is as good as it gets. Light, no restriction of movement, easy heat dumping, lots of pockets and the gaiters and hood all fit and work flawlessly. You will not feel a breze nor will you get any pow inside it, ever.
The only thing I'm not stoked on is the fit. The crotch is almst to my knees, and everything else I've ever gotten from Norrona was a ar more athletic fit. I hear the new ones are better tough, so that's cool.
Overall an amazing suit that for better or worse gets a ton of attention so be pepared for that as well. I'd give it a 9.7/10, with the only complaint being the "droopy ass" look.