Very disappointed - Big Agnes Blackburn UL 0 Sleeping Bag 850 DownTek

I bought this for a 0 degree bag. The only bad review I had seen talked about no bottom insulation. Big Agnes had replied by saying it was made to work with their Q core mattress for bottom insulation, I have the Q core mattress. It does not fit in the sleeve even half inflated. I took 3/4 of the air out to insert and then tried to put a little more air back in and the bag became a canoe. I decided I would still keep the bag and just lay it on top of the mattress. When I got in and out I noticed little pieced of the down filling everywhere. I looked for a defect and found none. I found down coming through fabric and out seams. I returned the bag. Very disappointed in this product. I have other Big Agnes products and found the quality to be good.