A:AnswerBecause the accessories kit is actually for the Hero 4, most of the accessories are compatible, except for that cable. The cable that you need to connect the camera to the computer comes with the Hero 5 Black
A:AnswerI've used the chest strap frequently and so far it has held up pretty good. I compared it with the GoPro strap and it feels and looks identical. Of course, I'm not into the super action stuff so I don't know how the other pieces will hold up under stress. The one item I find suspect is the wrist strap. Although it appears sturdy, it's hard to keep on and constantly comes loose (velcro).
