The same goes for my KU 3700, no holes/tears, it only got dirty. There were absolutely no problems with the fabric strength what-so-ever! People also worry about the noise, I can tell you that's not a problem either. Like I stated before, this pack exceeded my expectations! sab had a KU 5200 and he had similar results.
#1 I wish it had a bottom zipper for access when it's full.
I found myself constantly grousing every time I had to "dig" something out of the bottom.