My wife was a little less than happy with me when I bought three of these 65L bags for our trip to Peru (wife, son, me). She would have rather I paid about $100 less for each bag.Fast-forward a couple weeks when we're standing on an uncovered train platform in Aguas Calientes in the middle of a torrential rain storm (that soaked through my rain jacket) for 10 mins while we waited to board the train... my wife looked at me like I was traveler-genius bordering on traveler-savant. Even though we were all completely soaked to our bones... everything in these bags stayed dry.The good...These bags are completely overbuilt for travel. They are tough! ... and yet don't really weigh much. Loading them up with ~40lbs of gear was no big deal. The bags easily held their form, even when thrown around by porters. I have a feeling these bags will last well past a decade of hard adventure travel.Also great is the bright orange color when you're picking your bags out at baggage claim.I also like the backpack straps. Changing trains in South America means grabbing my ~45lb bag, my son's ~35lb bag, and other misc. Throwing my bag on my back worked very well. I would not want to use it as a backpack for more than an hour or so, but when you need it... it's not a problem.It's awesome at keeping the elements out. I would think twice about totally submerging it in water, but it performed excellently in one of the worst tropical rainstorms I've ever been in.By duffel bag standards, 65L isn't huge... but it was more than enough to pack all my gear for a 10 day trip to Peru, including hiking boots, poles and a couple deflated soccer balls for the small Quechuan villages we trekked through.The bad...The bags take a little while to get closed and ready to move. You don't just zip it up and go... you push out the air, zip it, roll it, push out more air, and then proceed to fasten and cinch a minimum of 4 straps to tighten everything down. And in my case... you end up doing that at least twice because you forgot to pack something in the bag, or your wife ran outta room in her bag. If I'm honest, it's kind of a pain.Also a little annoying is that you cannot remove the backpack straps very easily. Half of the baggage handlers grab the velcro'd down backpack straps instead of the carrying straps which means everything is out of place and snags on everything.Less annoying, I would have liked at least 2 real zippered chambers on the outside of the bag for storing things I might need more often (toiletries, etc...). There is a pocket on the side of the bag, but you can't get much in it of the bag is already full.Conclusion...If you're looking for the ultimate adventure travel bag that's fit for traveling through the Amazon, or tied to the top of a Jeep, AND you have the extra bucks for the price of admission, this is your bag. Anything short of that, you might want to consider something cheaper.