I‘ve used it a few years ago to edit a video* and it was great. It uses the same UI paradigm as most non-linear video editing software, a timeline with tracks on which you can place, drag and trim clips. I used Final Cut Pro 7 before and had no problems to get up to speed. It was also stable. The only reason I don‘t use it at the moment is because I‘m on OS X for now.

* https://vimeo.com/107907361