I have just finished the 3rd utility quilts for my girls. Each has a double layer of Morning Glory HiLoft poly batting for super warmth (we live in a very cold area during the winter). I did straight line quilting with the walking foot on my Janome 6600. Yes, it was bulky.....yes, it was difficult at times to maneuver all that bulk.....no, I didn't attempt fmq.....yes, my 6600 zoomed right through them with no tension issues..... yes, my girls love them because they are super warm.....no, it will not fit in my washer (laundromat only).