CameraLabs finalized their very long and very detailed GX9 review. The conclusion:
Panasonic’s Lumix GX9 is a feature-packed mid-range mirrorless camera, featuring a 20 Megapixel Four Thirds sensor that’s stabilized within the body, an electronic viewfinder and touchscreen, both of which can tilt vertically, 9fps bursts with continuous autofocus, 4k video with Panasonic’s array of clever 4k Photo modes, and Wifi complemented by Bluetooth for easy location tagging and seamless connections. Vloggers will wish it had a microphone input and a screen that flipped-forward to face them, while serious action shooters will be better-served by a camera with a phase-detect hybrid AF system; I’d also personally like it a lot more if Panasonic had used an OLED viewfinder panel which, to my eyes, delivers a steadier image. But there’s no denying the appeal of the broad feature-set which covers most bases, image quality that can compete with rivals with bigger sensors, and the chance to use the largest catalogue of native mirrorless lenses. A recommended all-rounder.