I ordered 501 original fit in medium stonewash.  In fewer than six months, the crotch material had come out.  I could no longer wear them and returned them minus a stocking fee of about $8.

The good part is Amazon's ability to take back a failure such as this.  I grew up in 501s and have always found them to be comfortable and tough.  Now, they're just comfortable.

The seams did not come apart.  It was the fabric.  Originally, fabric was so thick that they were hard to wear before being washed.  Even after washing, I could stretch the pants vertically and hold them from the bottom.  The fabric was that heavy.  Now, it's like gauze in comparison.

I'm going to try once more and hope for the best.

Levi -- get attuned to quality and stop selling junk.