Pros:
small, compact and neat casing with metal mount,
very good image quality in the frame centre,
negligible longitudinal chromatic aberration,
moderate lateral chromatic aberration at longer focal lengths,
well-controlled coma,
slight astigmatism,
efficient and noiseless autofocus,
efficient image stabilization.
Cons:
weak image quality on the edge of the frame at the longest focal length,
very high lateral chromatic aberration at the shortest focal length,
high distortion on both focal extremes,
significant vignetting,
weak performance against bright light.