° accessory is sufficient to start with and very extensive, but might still two things more contained (eg bike mount), but do you enable yes buy more cheap and the GoPro stuff fits so well, even if you have to tinker some something because the ActionPro is thicker.
° passable images when shooting in very low light (night) when filmed subject is bright enough
- Large heat generation when the camera with display on longer works (> 20min)
All in all it is a worthy competitor for GoPro, plus much more favorable.
I once some shots cut together from her, the Can you view under [...]