Marylian summarizes her experience in English level M201, which included 16 units covering various topics like food, talents, celebrations, health, directions, the past tense, biographies, and telephones. She highlights her favorite lesson on talents and sports and the various tools and materials used, including a class blog, videos, photos, and international friends. She thanks her teacher Doris for her help and effective teaching style, and hopes to continue learning from her in future levels.