Just my opinion and experience (recent). I purchased W&N years ago and always postponed using it "for something special." Well, I finally got around to using it because to be honest, there's only so much time left to wait (lol).
I love using it but I ended up needing more batting, and I purchased Mountain Mist Ultra Fine. Big difference in how it handles. I am making the quilt as a quilt as you go, and the Warm and Natural stays in place when I am stitching these long strips. The Ultra Fine has to be hand basted first. Not loving it.