Summary: I love the camera but the 14-42-mm kit lens produces only sub-par photos. To get the most out of the camera, get yourself a 45-150 zoom lens and the 20-mm (1.7f-stop) prime lens (and, of course, other lenses should you want them). I use the 20-mm lens all the time, especially at night, when I carry the camera through cities for night photography. Photos taken with the 14-42mm (and the 14-mm too!
Summary: This lens is adequate, in build the focus ring grabs when turned. From a youtube video I learned that it was possible to get somewhat average bokeh. Add the hundred dollar used price and you have a lens that teaches patience. The upgrade to this lens is a much better build, I recommend it for less than twice the price used.
Summary: I got this lens as the lenskit for my GF5 and i was shocked to see that the zooming was choppy. This is not an ideal situation for filming (why allow the zoom to be used if the image goes out of focus and jumps when zooming). I come from a SONY NEX (5n) background and even though the standard zoom lens given with the basic kit is cheap and slow optically, it is butter smooth when zooming. I've ordered the 14-45 Panasonic lens as i hear this isn't an issue for that lens.
Summary: I bought this lens a while back to use with my EP-2 and have to say I am a little disappointed. It is a decent lens with a moderate zoom and focuses relatively quick, but the image quality is where things go down hill. Try to use this during the day when there is good light. If not you may find yourself looking at grainy and off color images. It is a very inconsistent lens. For everyday daytime use, this lens is not bad especially the lower cost.