The purpose of this study is to find ways to monitor and evaluate the user experience of learners as they use an e-learning system. To do this, we have identified several factors that allow us to measure this experience. We have designed an online measurement scale, presented as a self-administered questionnaire, specifically dedicated to e-learning platforms. With this tool, we can quickly isolate aspects that are perceived as critical, and that often require improvement actions. Finally, we tested our measurement tool over two sessions of an online course. The results of statistical analysis are very encouraging, showing that the learning platform used is considered simple by learners, flexible, secure and encouraging autonomy. The results also show that the platform has a deficit of social interaction (interactions between learners and their teachers, as well as between pairs), which should be remedied in order to improve learners' experience. [For the full proceedings, see ED621620.]