This is a follow up to a review I made afer just receiving the bag.Just spent five days in the South Michigan Reservoir area of No. Colo. First, it rained parts of all five days. This rig in 100% water proof. The contents stayed perfectly dry. Second, the only concern I had about the bag was the single cross bar support in the bottom. It stayed in place, never needing adjusting. I hauled my tent and cot out strapped to its' top, and it handled it with no problem. Third,, I accidently tested the material strength against a broken tree limb. I dreaded what I would see, but the material is hell for tough. Can't think of anything else to say about it---rather than it's tough as hell, waterproof, great construction, good strong strap system, and the steel frame holds up without a hitch.Out of the box, snapped/strapped, on the wheeler, less than 30 minutes.Love this bag already. For my use, much better than the hard side rack boxes for one reason, this one can be easily removed when I don't need it. Great construction, strong non-slip straps. Good investment.