I'm finally able to write a confident review after my latest trip at winter elevation with single digit temps, wind and sideways snow. It's super light and the option of only bringing in the main tent for quick assaults/bivouacs is killer. The included vestibule and gear loft are features that automatically put it above similar Black Diamond's and the Mountain Hardwear Direkt. It is quiet in wind. The material sheds snow well. It has good ventilation with the option to fully open air vent or mesh vent. Vestibule window is like having live NOAA updates from the comfort of your warm sleeping bag. There are enough guy lines to plaster it anywhere.
My main complaints are:
It's really short, I am 6'1", use a long bag (6'6") and can't keep my footbox off the wall.
The vestibule is sick but the connectivity to the tent sucks. If it's windy and you are parked back to the wind, the blowing snow will sneak in through the cracks between the tent and vestibule. This means that in high winds/snow you'll wake up to a little layer of snow INSIDE your vestibule.
Bare in mind this thing is small, as the name implies it's an assault tent and 2 people would probably only want to share this for quick overnighters on the move. I use it as a solo tent since my stays are longer, in single locations and desire more comfort. This thing is great for my purposes and it would achieve perfection if it were just another 6 inches longer.
For what I was looking for, the Assault 2 and the Nemo Tenshi are the best tents on the market. Knowing what I know now however, I may give the slight edge to the Nemo since it appears the vesty is better connected to the tent.
Note: To those complaining about rain leakage; if you want a rain shelter, save some money and buy a three season tent, or save a lot of money and get yourself a tarp from Home Depot. This tent is intended for high alpine, not rain forests.