Not exactly going to be a long term con. The official website clearly states the same, which is why this piece of software should not be used for important projects. Then again it is so damn good that Olive editor is right now my primary editor for most projects. The fact that there is NO stable version of this software does bother a bit as it's ability to handle complex projects is almost unpredictable. But all said and done, it's still not crashed on me even once. Even though an alpha, the best damn alpha release ever. See More
Preview very slow (need to create a proxy 25% the scale and also resize the render output and even then it's often still slow) Doing a zoom (pan/scan) requires hacks https://blender.stackexchange.com/questions/42094 Transitions are fully manual Playback speed adjustments are very manual especially if you want to keep them in sync with the audio. .... See More

Davinci Resove is another non open source video editor for linux, like Lightworks. It used to be a very excellent color grading software, and now, it's a great video editor as well. You can do all the basic editing and some of the advanced editing on the free version (multi-camera editing, 3D editing, motion blur effects, and spatial noise reduction, etc are only available on the paid version)
Blender is a fabulously sophisticated 3D computer graphics and animation creator. Check out the Blender gallery for a sampling of movies created with Blender. It supports a large range of high-end abilities such as ray-tracing, key-frame animation tools, object tracking, super nice character modeling, realistic physics for great liquid and smoke/mist/gas effects, and realistic movements of objects and characters, and excellent realistic light effects.
Applying effects is as easy as drag and drop. But if you want to edit them, you'd need to right click on each clip and select Properties. You'd need to experiment with not-so-well documented parameters which take forever to preview just to see if you are on the right track. It is sort of easy to learn unless you want more than drag and drop controls. See More
LiVES is supposed to be mature, feature-rich and ready for more professional use-cases and even video jockeying. Both the website and the Wikipedia pages seem promising. However, although I was able to install and open it just fine, it refused to resize properly and did not import a single video. (If there is a “proper” way to import video’s, apart from the way the program makes it possible for users, then I was unable to find it.)

After briefly testing all the various open-source video editors I could find easily available for fedora 13, I came to the conclusion that kdenlive was the best fit. By and large most of the editors were plain unusable for more than 5 minutes or just had too many limitations. kdenlive has its own faults, including that its documentation is not always clear and one must refer to it constantly when figuring out the UI (hint: video tutorials were so useful to understanding the docs). Essentially, I can now do almost anything I need to with kdenlive now, but I would greatly appreciate it if the devs could improve rendering time, update the dvd creation wizard to support blu-ray, and add more rendering options (for example, ogv output does not support quality levels, only bitrates). As for stability, I saw several crashes when I was first exploring features, but none since.
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