I've been wanting an action camera for ages but wasn't willing to pay the prices required for the top end ones. I also wasn't willing to sacrifice video quality either, so I just ended up not bothering.
Then I saw this one and the reviews it was getting.
I have been using it for both a Motorcycle helmet cam as well as a drone cam. In both uses, it has been flawless. The image quality is excellent and it is able to keep up with my motorcycle riding without becoming jittery or skipping frames.
It's also the exact same size as the market leading action cameras so will fit nicely into all of the same accessories.
It comes with a load of attachments well as two batteries so you shouldn't need to buy anything else to get started.
If you're wanting an action camera with nearly all of the features yet only a fraction of the price of the market leaders, then this is the one for you. I can't recommend it enough!