My size Small just arrived – I will not have a chance to wear it in truly cold weather for awhile, but sure seems like the perfect jacket!
Weight is 14.1 ounces, with proportions that match up very nicely with the sizing chart. (I have a Medium in the Alpini, since I was told that ran a little short, and that by contrast the Mojave is a little bigger. This matches up with their relative fits, as my Medium Alpini is larger than my Mojave Small, but more like a half-size differential.)
Hood is designed very well to fit over a helmet, yet still able to snug down for helmet-less use around camp or inside a sleeping bag. Weight is even more impressive given that the features include a full-length zipper, two outside zippered pockets with fleece lining, an inside zippered storage pocket, velcro cuff adjusters, bungee hood tighteners, and a velcro tab at the back of the hood. (Just remember that you need to supply your own stuff sack.)
The relative warmths of jackets are always difficult to quantify, but it clearly has an exceedingly high fill weight as a percentage of total garment weight, and with the water-resistant down, it’s pretty much off the charts in comparison to synthetic fill jackets.