Had both GoPro Hero 5 Black and Garmin VirB 30, there is nothing I like GoPro is better.
G-Metrix is superior if you want information about distance, speed etc. The transfer to the computer is fast and smooth despite GoPro has USB3? so it is much tougher.
Voice features operate 10 out of 10 times, the Garmin barely reacts. Did However GoPro gave better color out of box but after you turned on the vivid colors of Garmin, they were just as good. Otherwise, run it in neutral and fix it in post-production.
Would highly recommend this camera in front GoPro 5, then so is compatible with all GoPro mounts