I have owned several pair of these jeans now in various colors, and have liked them.  When I got this latest pair, I thought they seemed a little lightweight and the fit wasn't quite the same (I've actually lost weight so no that isn't the issue).  They weren't necessarily uncomfortable, just different.  I wore them once and didn't have any issues.  The second time I wore them I was getting in my car and the crotch split wide open.  I didn't feel any resistance, just heard them tearing.  Luckily I was in my driveway and could go in and change.  It wasn't the stitching that tore, but the fabric about a half inch from the seam.  That is just cheap material.  No problems with the return through Amazon.  They served me well in the past, but if this is their new standard I won't be buying Levi's anymore.