What I love about decorator fabric is that a lot times the weight is not that far off from really good quality quilting cotton. I look for cotton and I look at the weave. Sizing usually comes out in the wash, I've only had a couple of pieces where the sizing didn't come out.
I also love the fact that the fabric is usually wide enough to do a back on most of your smaller quilts and there is no piecing required.
Carole