I took Course 2 and 3 at this place since last year. These two courses covered many grammar rules in addition to Katakana and Kanji. In Course 1, we made sentences by using masu-form only. But in real life, Japanese people are not always talking in Keigo(the formal way to show respect). It is important to learn other verb forms and expressions. I did benefit a lot from these two courses, and will take Course 4 next month.