Overall one cannot ask for a better "normal", 50mm-equivalent-FOV lens for m4/3s at this price. If one doesn't need or want f/1.4 or even f/0.95, then this is a no-brainer to buy. I used the Panny 20/1.7 before but find I don't "see" photographically with a 40mm-equivalency.
Very solid and well-made; Mounts to camera body (Oly E-PL1) tightly and securely; Over time never any wobble whatsoever; Very sharp, high-resolution even wide open at f/1.8; Bokeh is smooth and pleasant; Included lens hood; Focuses fast and sure even on this "older" camera body
A bit flimsy lens hood mount but hardly use it so no big deal; Thus the 4 instead of 5 for build quality; (I'd rate it 4.5 but that's not possible above.