Currently there is no other video editing app for the iPad that has as much features and shows as much potential as pinnacle studio. A key advantage is that there is excellent developer and community support behind this app as opposed to some of the other offerings.
While there is room for improvement (second video track, improved integration of lower thirds and picture in picture for example) there is continuous growth of the app and the user interface and learning curve means that you will be making movies in minutes.
Media Vaud about Pinnacle Studio Pro, v5.0.4