I use the lens mainly to take pictures in low light conditions without a tripod and flash. In conjunction with the built-in stabilizer of the Olympus EP-2, you can still achieve acceptable exposure times without having to turn up the isovalue strong even in low light.
Is also nice that you can exempt from open aperture persons reasonably objects from the background.
A Must Have for any user of a Micro Four Thirds camera.
Addendum:
Half a year later and I am still very happy with this lens.
I particularly like that one enters into no compromise with this lens.
It's small, it's light and strong, it is open to very sharp. Normally you get, if at all, only two of these points in a lens and then only for a lot more money. That the pancake can unite all without compromising himself, I find still considerable.