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.
Photographer-friendly controls; Good OLED viewfinder; Good image quality with sharp detail especially with RAW; Vari-angle touchscreen display.
Only 31 autofocus points; Subpar continuous shooting performance; Soft corners at wide-angle; Flare issues and fringing shooting wide-open; No 4K video; Poor battery life.