I quilt a lot of charity quilts and we use the pillowcase method almost entirely on these. We used to tie them, but now, our "tie-er person" has left the group, so I've been bringing them home to machine quilt. They are often a little off, so I lay them out and pin them, smoothing from the center. I free-motion machine quilt in fairly loose patterns using my darning foot and feeddog down position. I usually work from the center outward towards the edges. They come out pretty well this way.