Photozone tested the new Panasonic Lumix G 12-60mm and writes:
The question remains where this leaves us in the grand scheme of things. In terms of quality the lens doesn’t really offer anything over the basic kit lenses and not too much over the more extreme 14-140mm zoom lenses in the overlapping range. To be fair – the Panasonic lens shares this characterization with many similar lenses (in different systems) but as such it’s also a missed opportunity once again. So it’s a good lens but nothing special either.