Summary
The Firefly X is pretty middle of the road: excellent audio quality, decent video and OK image stabilization. The only stand-out feature is the waterproofing (without external case). And I would not trust it all that much as it is pretty basic and some of the clips holding the battery door in place is pretty sketchy. They do not hold on as tight as I would hope so I do not trust this camera to stay waterproof. Overall I cannot find any glaring flaws in the camera but there’s also not too much that it excels at. Perhaps it’ll be more worthwhile when it goes on sale in the future but at a $170+ price point I think it is too much money.
Where to Buy
Conclusion
I wouldn’t buy it. Spend $30 more and get the DJI Osmo Action, which at $199 is better in every single way.