I have had some success with
AVS Video Editor, when I was working on a PC.
Mind you, I was kind of a novice at working with video, and the app was pretty inexpensive - I think it was $30.00, or something like that.
That said, I thought it did a fine job, and was pretty intuitive. My only complaint with it was that I thought the interface was a bit clunky, especially when learning how to create my own menu. Then again, a menu isn't really the biggest deal to me, as long as I can select each individual track, I'm happy.
I looked it up again, since my license has expired, and apparently they're offering the license for their apps, two different ways:
1) a one-year license for $39.00 - I believe this gives you access to any/all of their apps
2) an unlimited use license for $59.00 - again, this seems to be for any/all of their apps
If you want to just check the app out to help you decide if you like the features or not, you can get a free demo version, which will print a little message across the screen, but is a full-featured version.