* Are actually waterproof
* Don't have lots of unnecessary compartments and pockets
* Lift on and off really securely, yet really easily
* Can be wiped clean
* Super durable
* Light
* Can be worn as shoulder bag, or carried as a tote
* No zips, yet can be completely sealed
I got my pair of Ortlieb Back Roller Classics as a present four years ago.
After I had used at least one bag almost every weekday since then, the rubber shoulder pads had recently ripped and the inner pockets frayed over the screw nuts.
When I contacted their customer service with pictures of the damage, they sent me replacement shoulder straps and pockets free of charge (they even covered shipping costs) although I had no receipt to prove the age of the bags.
With my Ortlieb bag, I regularily get stuck with one of the hooks in the back pockets of my trousers, so I have a habit of always removing the hooks altogether if I'm not using my bike, which is a bit of an annoyance. The Ortlieb bag is much more durable however.