I rarely wash a quilt when I finish it because I have a front loading machine which is supposed to save water. I don't think it washes quilts with enough water to avoid running colors. So if I do wash a quilt, I should take it to a laundromat and use the big washers there. I do like the feel of a washed quilt - softer and puffier - and I know quilters who prefer that as well. Do whatever works for you.