Brilliant lens from Panasonic and Leica. It's ideal for very close up macro shots or general portrait photography. Beautiful bokeh, fast autofocus and when combined with a 5-axis stabilized Panasonic body the lens will also combine it's own for dual stabilization.
Image quality is excellent and sharpness tends to stay consistent in the middle and in the periphery, outdoor it's best, but at f 2.8 it's great for indoor use as the dual stabilization will provide you with a crisp shot if you have steady hands.
My only quibble is that the casing is made of plastic, other than that the manual focus ring is rubbery and feels nice when using manual.
Overall it's a great lens, even though the price is a bit high, it's worth the money one serious about macro or portrait photography.