Quite a few of the ladies in the guild here use fleece for batting. It seems to work fine, but since I have access to the border I will stick with Warm & Natural. Mostly because I like the crunchy feeling after I wash the quilt and fleece is not made of a natural fibre so it doesn't shrink. I have used it for backing on a charity quilt and had a problem with it streching and getting pleats.

Just my 2 pesos worth.