Before you judge, you should really get to know their story. They believe in a "full quiver" and that God will give them the children they are meant to have.
They do not take govt. money or need any support like that, so they are harming nobody.
Of course the girls make their own clothes. It's a great life-skill to have, and I wish I knew how to sew. And do you really expect a family of 16 to shop at the mall? The most important thing is that the kids are happy, well behaved, smart, loved immensely, and have a strong faith.
Whether we have one or multiple children, I hope mine turn out to be just like the Duggar kids.