It's a great app when things work. There have been several times when I open the app, but have no sound. Also if they could make the trimming easier, that would be nice too. Currently when you trim, you can not watch "only@" the section you want, video still plays from beginning to end giving you no preview, until later. But then when you go back, all the other parts default. To get it right, you have to go through it several times...
Other than that, it's good. Guess you can't complain about free. Just some observations for the creators...