Backside-illuminated sensor for good low-light performance; Very long zoom; Good printed performance; Very fast autofocus.
Autofocus is not always reliable; Auto white balance renders skin tones a little red; Slow digital zoom.
The first genuinely compact--almost pocket-friendly--compact system camera, paired with equally small, interchangeable lenses. Great ergonomics for the size, and it feels like a real camera, not a computer with a lens.
Very restrictive lens selection at launch. All but two current lenses have severe limitations in functionality. Performance is sluggish, and image quality trails large-sensor cameras by some distance.
