I've made two.. they're freaking awesome
As for the baffles, I used 3 or 4" net for the baffles. Attached all the strips to one side of the quilt then I put the two pieces together and I'd sew a horizontal row then a vertical, spacing it out so that the down can move throughout the quilt. You can see the seam lines in the picture.
For the down, do yourself a favor and put a tent up in the house, using an extension tube from a vacuum I'd cover one end, put the other end of the tube down in the down sack and cram as much into the tube as I could. Then I'd put the tube in the quilt and try to force the down at as far down into the quilt as I could. You'll find out, that stuff goes everywhere, if you work slower it seems to help
Was out in it last night, was 32 when I got up this morning and there were times I had my arms outside the quilt to vent some heat, this thing is stupid warm.