Nice size, nice shape, nice colour, nice that it's padded and conforms comfortably to the body.
But the zip is either not properly designed for the curved shape, or maybe just not attached to the bag appropriately (I'm not tailor enough to know which!), so compared with some rival products (eg Baggu) the action is very sticky and awkward. Too early to know if all the yanking and snagging will affect the longevity of the zip itself, but I suspect it might at some point. The zip pulls themselves do not seem especially high quality.
All in all, then, a mixed, um, bag.