it's all in the packing (45 L review)
Pros: The wide opening is really great for packing and unpacking and finding your gear, and the 4 straps and handle/strap can also be useful for tie-down on a boat.
Cons: I found it harder to purge the air enough with such a wide opening for a comparatively shallow bag. I think this was due in part to the items I had and how I packed them, so I will explain. I used this bag on a river trip to hold some camera gear, tripod, small camera pack, and a couple random things. So the items themselves created a problem in purging the air around them. I also used this bag for canyoneering/backpacking and had items organized into 3 stuff sacks that I then put into the dry bag. The air purged a little easier with these softer items, but still had trouble getting it all. I think it would work better if you are not packing and organizing items in other stuff sacks or cases first, or if you have one stuff sack with say a sleeping bag, and then fill in all the space with your clothes.
Suggestions: I think adding a purge valve or a zip-lock style closure would make this bag close up better and more securely.