Bought this one second-hand some years ago and it has proved itself to be an extremely useful lens - doubling as a 'standard 60mm (equiv)' and a fast macro. Sharpness is excellent but bokeh can be rather 'busy' in some lighting - especially dappled woodland sunlight.
Very sharp! On full frame cameras; you can get useful results if you stop down to F/8 or more
7-blade iris makes for 'busy' bokeh; Auto-focus not the quickest