Definitely quilting rather than piecing, and be on the look out for hassles! Use a metallic embrpoidery needle, as they shred the thread less. Also try that magic thread conditioning liquid, and prevent it leaping off the spool by netteing it with a thread net. I uses some to quite nice effect on my Accidental Quilt. I use it quite a bit with kids, despite the frustrations of thread breakage, because the results are so nice. Sew s l o w l y with it too - it also helps to reduce breakage.
I wouldn't try hand quilting with it - it's bad enough handling it for machine quilting!