Love this bag. I also have a Kanken 13" laptop bag but bought this as I needed more carrying capacity. I love how lightweight this bag is and the fact that you can detach some of the straps if you'd prefer not to use them. It would be great to pack or carry as extra luggage or to take along as an extra packable bag when shopping. The good thing about the High Coast compared to the Kanken back pack is that you can actually fit a drink/water bottle in the outside pocket (The Kanken sadly doesn't allow this). The drawstring closure at the top means that you can carry large items and easily leave them secure but sticking out of the top of the bag. I work outside in the mud and rain (archaeology) and it's withstood both of those tests. You can improve the water repellent using Fjallraven wax if you wish and the colour still looks great covered in mud!
Perfect for the beach and incredibly durable - I have chucked this around the place and due to the fact it packs into its own pocket, this has become a staple piece of kit I take travelling with me when space is limited!