I bought the hooded version about a month ago. Great jacket, very puffy, listed fill is at 7.7 oz. I really like the hood; very worth it. And I'm not usually a fan of hoods. This is a great bargain.
I sized up by accident from my normal medium to a large. By accident, in that they only had the large in a hooded version. As it turns out, the large is perfect for me. Room to layer, but I'm not swimming by any means; arm length is great. I'm 5'9' 140lbs.
Oh--so far, no leaking down, although the weather has been too warm to wear this much. Also, the pertex is very good at wind resistance.