I have listened to up to 107 lectures. The grammar explanations are explained in detail along with the memory operation structure, so it is very helpful for non-majors to understand. At first, I thought it was expensive for a basic grammar course, but the instructor leads a community so that I don't feel lonely studying alone, and he manages the students thoroughly by leading sessions (video meetings) every week. Above all, I am very satisfied with the feedback and listening. I think the best advantage of Ellen's basic grammar course is that it has the same quality as an actual offline class, even though it is an online class.