Pros
There are absolutely NO pros.
Kontras
Incompetent workforce, people refused to help me get access to this site. I was a week behind in calculus 1. The deadlines are set up poorly. The people in the help videos do not share anything related to the topic and rather share a completely different topic. It ruined one of my calculus quizzes. As a whole, lumen has done very little to help me become successful in calculus.