Action cam is pretty good, it has really good stabilization built in, but it has downsides.
If your getting it for the goggle strap thing, son't bother because unless you want to suffocate your face it will shake
Any form of sleakness is removed by the fact you can't adjust the angle without this massive thing
I've got some Action cam stuff in my video section. (it was filmed at 1080p but I think I may have saved it at something lower)
The action cam is a good $100 cheaper then the Black Edition Gopro, but there are some cons.