The best thing about fusion is its support system and training of new users from scratch to advanced level using all features in an easy way. Sometimes it gets slow when loading for very large presentations (over 30mb) but this can be overcome by waiting till next session/connection. Make sure you go through their demo videos and try out before purchasing otherwise your presentation will not turn up as expected. I used it during my college days while preparing for exams which helped me clear most questions with ease.