The Q4 has significant barrel distortion. I used a Q3HD a fair amount and always naively thought that a wider angle lens would be a winner, since it would allow closer placement for the same framing, thus delivering better audio for my "look at me play guitar" video efforts. But making very wide lenses without barrel distortion is a big bucks game, and these Zoom cameras are not big bucks items.
Even without the fish-eye effect, close placement gives visual distortion, exaggerating the apparent size of the closest object, like a nose or fretting hand.
The Sony MV1, even with its laughable monitor screen placement and convoluted menu, turned out to be a more useful camera, but not useful enough that I would recommend one.