There are two versions of most of the fusible web products. The 'heavy' version is a no-sew product. It's meant to hold without sewing and will usually gum up your needle if you try to sew through it. The 'light' version must be sewn on or it will eventually come off.
My experience is most of these will fray a little bit when used/washed (especially with an open edge treatment like blanket stitch) but that look doesn't bother me especially when you're going for the country look.