Excelent pack, I've just arrived from a entire week of backpacking in which I carried this pack all day, from London to Brussels to Amsterdam to Frankfurt to Paris and back to London. Its design makes it easy to pack everything you need as well as its comfortable structure in which all the weight repose in your waist and you slightly feel the strap on your shoulders. Other special features to highlight are its ventilation system, and the included impermeable.
Worth its inversion, because its good quality and long life.