The ease of use, it's functionality for our needs as an E-Learning provider. I can't think about anything at this time to dislike! Great user interface - very easy with which you are able to navigate your way around easily without any issues or glitches in sight (unlike other platforms). We have been using them since they first came out over 5 years ago now so there aren’t many complaints from us really but we do look forward to future updates especially when new features become available such as video editing/embedding etc..