Doing the ragged edges makes it ever so much simpler! I started one years ago for use on the bed in the back of our van. Thought I was going to be all smart and do the flat fell seams. What a pain! It never got beyond baby quilt size. And never even got a backing. But it was warm and durable.
Have started collecting more jeans to do another one but this one will have the ragged seams for sure.