If you like it, go for it. However, poly and poly blends do not show quilting as good as cotton. I just use these items for household decor.
I've made some quilts to use up poly and poly blends and then use flannel on the back. Pretty common with children's fabrics since many character designs only come in blends.
However, if you were involved in a swap, I would definitely make sure it is 100% quilter's cotton.