as seen on one of the pictures of the product type (back) carries the bag over his right shoulder, and I think it's the most comfortable position to carry this bag. However, by switching the bag to open it and access the interior, it is the lower of the two positions, as only the right pan is easily reached, while the left one is upright (hence a significant risk of dropping the contents of the bag by opening it!).
The only position for the two sides of the bag properly positioned (as if the bag was placed flat - see photo "Step 1 - 2 - 3"), and although it is on the left shoulder (that what does the guy in the picture, in fact, he did not deceive them!). But, unfortunately (in my case anyway), the carrying position is much less comfortable: the back of the bag rests on my right kidney (when I wear it behind, of course), while in the carrying on the right shoulder, it rests perfectly in the middle of my lower back ... shame! Ergonomic study Error?
So, for my part, I have to shoulder such a switch when I wear it in the back to walk and such shoulder when I want to open it to take qquechose in, by tilting from side to side keeping the strap around the neck. It's not ideal, but it is the only viable solution I found (because completely removable for changing shoulder is not practical). I hope that my explanations are clear enough, no scoop to describe it all ....
Maybe the strap deserved to be placed in the other direction. or it is I who am wrong Foute (though I have not scoliosis!) Laugh!
Finally, I still regret this purchase. it's still a great value.