I have never had a problem with Minkee. I do it the same way as Lovin. No problem with quilting since the spray basting kept it from shifting. Trimmed the backing to two inches all the way around and folded the edges over the top of the quilt and used a decorative stitch to secure it.
If you decided to do the pillowcase style, think about using a decorative stitch to "tack" it in several places. A little heart or flower would be cute.
BTW, pretty top.