Hello people!! this is Marco from Italy... i'm a blogger, our blog is focused on Action Cam and Drones Here my two video with SJ7 STAR Firmware 1.6B 4K video and here my review in Italian language http://www.actioncamitalia.it/2017/03/14/sjcam-sj7-star-la-nostra-recensione/
Here is a gyro-comparison video of SJCAM SJ7 Star, SJCAM M20 and ThiEYE T5e (all videos recorded in FullHD 60fps):