Re. the bokeh - and looking at the pic of the boy hanging off the climbing frame - the point highlights, esp. to the right of the boy, appear as rings, a bit like a mirror lens. I'm no expert but if a bright point is out of focus, shouldn't the resulting blur still be brighter in the middle than the edges? People have commented on distracting straight lines. The above suggests to me the lens will tend to add a secondary line outside the original, spoiling a smooth blur.