When a quilter has the courage to show their quilt, they are obviously very proud of it and should be encouraged with praise. I wouldn't critique unless asked and only if I am experienced enough to give good advice on that particular quilt design. If I can't find one good thing to say about it, then I wouldn't comment on it. I wouldn't want to be the cause of someone giving up a hobby because of some unkind words. Afterall, art is in the eye of the beholder :-)