I have learned the hard way myself on this subject--got rebuffed in no uncertain terms for attempting to point out a mistake in a quilt-learner's first efforts; lost contact with the person because of it; my advice is to let it ride and don't agonize over it like I did. It took me forever to get over it and I lost a friend in the process. You gave it to them, let them enjoy it and love you for that.....