It's very intuitive, easy for both learners (users) & teachers/researchers /managers who are new in this field of work as well experienced ones alike! The features available at free level version allow one learner user per computer which allows great flexibility especially when you have more than 1 users or computers running simultaneously with less resources such us RAM etc.. I think it should be made better so other things like quizzes can also included into its learning system where some people might not want just text only presentation but may prefer something interactive instead? A simple online quiz would help solving most problems i've faced while implementing lessonflow within my institute during different trainings we did together last year 2015!!