The positives I want to be brief: The program does what it is intended, does not crash and produces flawless films in HD.
Now for the little weaknesses:
1. When you start the program, the movie plays in the preview window initially quite fluid, even with large projects. After a while (several steps), it begins suddenly to stutter. This remains so until you close the program again and restarts. But that always costs some time.
2. If you go to a clip applies a filter (eg zooming and panning), then you can make it no more snapshot. But that would be often very useful when you do in photos (panoramas) per program a swing and will be the start and end positions any longer.
3. The filters and effects I find sometimes very confusing and hard to use, or understand. That may be due to me and because I was used to the operation concepts of the other programs.
4. If you removed from the film a clip, and the transition effect disappears. If I have defined a standard effect for each clip, I would expect this is true of the default effect for the resulting new transition.
