I also use Warm and Natural. I like it because you can let your quilting be as much as ten inches apart. I seem to prefer stitch in the ditch, and even though I have never let my stitching be more than 8 inches apart, I like knowing that I could.
I tried polyester batting and didn't like it because sometimes it poked through when I stitched and I'd have white fibers sticking out.
Dina