I used this bag last winter and it is so simple and bomber. The material is very durable and doesn't shred under my ski edges.
When it rainy you don't have to worry. Or when we were canoeing across for witer ski touring missions I knew that all my camera gear would be dry regardless of the waves splashing over the boat.
Downside of it being so water proof is that condensation builds up and you have to dry it out.
It will last forever.