I have a set of those. Tomorrow morning early my wife & I are going on a loaded bike tour, on Kangaroo Island. I am carrying 5kg in each of those on the back, and the bed rolls on the front.

They have the Ortlieb fastening system which works very well.

They are not waterproof. I rode in a downpour from work the other day and when I checked at home, there was water in the bottom. I think it sneaked in somewhere at the bottom. I had the shower cap on.

There are no extra pockets inside which I would have liked.