If it's the same as the ones they had in a couple of years ago (looks the same but is cheaper I think) then the quality is very good.... IMO
We have one on each of the boats a frames and we get some good footage.... I'm no expert, but I'd struggle to tell the difference between the footage from our maginon and my first go pro.... Someone will probably be along to tell me / you different though.... Either way I of think its a bit if a bargain