I love how easy they make creating an interactive video lesson! The user interface for students learning English through lessons with me has been very intuitive since we started using this system last year (2017). Creating videos can be really time-consuming so you have much more flexibility if someone else does all of those tasks rather than having them do everything yourself; plus there are some nice features like being able compare different versions easily just by clicking buttons next or previous within each version without needing another tab open etc.. Honestly - nothing at present as far my own experience goes but perhaps because our school uses other platforms too such as Zoom which maybe not quite same level yet? If one day however when their technology catches up then i would definitely look into upgrading from zoom due its popularity especially amongst schools who use Skype out regularly anyway!!