Conclusion from DPReview:
The G1 X Mark III is an impressively compact camera with a large APS-C sensor and a zoom lens with a versatile focal range. It has tons of direct controls and can produce great image quality, but is expensive and the permanently attached lens has a slow aperture range and hampers an otherwise capable, pocketable camera. Read the full review
General photography, landscapes and world travelers who don’t mind bringing along an extra battery or two.
Not so good for:
Those who want to be able to photograph sports or work primarily in low light.