I prefer the Mettler TA101 Web Bond basting spray, rather than fusible batting. It works great and has no odor. It was recommended by a teacher for holding layers together in a class I was taking. I now used it on my quilts when I get to the end of the quilting - it's tacky enough to hold, but easy to adjust the fabric if I need to.
I used fusible batting once when I did a watercolor quilt and it gummed up my sewing machine.