Ranked in these QuestionsQuestion Ranking
Pro MFT lens mount allows for a wide variety of lenses to choose from
Micro Four Thirds system is a standard used by Panasonic, Olympus, Sigma and many others so you're not locked into a having to buy lenses from one manufacturer.
Pro Shoots good quality 4K@30 video
The G7 takes footage from a crop of the sensor and includes focus peaking and zebra striping tools allowing you to get good quality video.
Con Can't zoom in on video in playback mode
There's no way to zoom in on the screen in playback mode to check details of the footage.