I ordered one of these online to check it out and received it today. Over on Hammockforums there has been a lot of talk about these bags having inconsistent fill. I think the reason for this perception is that in many of the bags, the down has settled to the bottom. When I held it up to the light, there was almost no down in the top of the bag. The chambers are continuous, so I laid the bag inside-down on a bed and was able to "sweep" the down with my hand from the bottom baffles to the top. It then had ~1.5" of loft on the top.
Overall, even with all the down on top, the down is pretty sparse and can shift easily. The bag is not sewn-through. As far as I can tell, its baffles are around 1.5" tall, and they are about 6.5" apart. It needs more down to prevent shifting. There is more down on the torso than the lower legs.
The bag has sparsely-filled draft tubes along the zipper and above/below the neck. The neck draft tubes and the head opening have heavy shock cord and big cordlocks to cinch it together. There is a small zippered pocket on the inside above the chest. The hood has a lot of down and is warm. The bag itself weighs 21.7 oz. The material is a micro-grid polyester ripstop that feels like plastic, but is soft. It does not have any DWR, so I might try to spray it with a water repellant and see if it holds.
Sizing - I am 5'10", 180 lbs, broad shouldered. The bag is big enough for me, but I wouldn't want to be much bigger.
I think this will become a fun project bag. I will replace the heavy shock cord and cordlocks with lighter ones, and add around 3 oz of down. This should be pretty easy because there is a seam inside of the bag, along the side opposite of the zipper, that will be easy to pick and gain access to all the chambers. I thought about replacing the zipper, but it would be a lot of work. Here are some pics:
Bag slightly open
Bag compared with a true 30 degree quilt - stock JRB Hudson River. The Hudson River has about double the loft, but it is hard to gauge in the pics.