From the demo video it looks like Cameo has an interesting take on editing clips. Zooming in on a clip and editing it directly looks much easier, particularly on a iPhone-sized screen.
9 times out of 10, I just do quick edits on movies in the built-in Photos app and then occasionally fire up iMovie for something with multiple clips. I usually forgot to use other apps to be honest. But Cameo looks like a good option to keep handy.
Editing this video was pretty quick and easy with Cameo. My main frustration with the app is the inability to add/edit still photos to your projects like you can with other video editing apps like iMovie.