I picked up a Maxpedition rolly polly pack in a trade and decided to try it out. I kept cramming gear into it over a 2 week period when I was out and about in the woods or desert. I noticed the straps are a bit narrow for any type of heavy load. But this pack is perfect as an emergency pack - which, im assuming it was designed for.
I did a bag dump and was surprised at the ammount of gear i had stuffed in it.