I have done Chika sensei All in one JLPT N5 course, Japanese speaking course for beginners and I am currently doing the All in one JLPT N4 course. All of them were very good. I get one on one teaching with Chika sensei correcting my answers promptly (same day or next day). I always look forward to receiving the daily lesson email and the correction. The course is well balanced and follow a natural progression which makes it easy to study. The good thing is that you have access to the course for life so you can always go back and study, I am still going back to the JLPT N5 course when I forget grammar points. Chika sensei is very dedicated to teaching; she obviously works hard to give daily feedback even on weekends ; she also has a good sense of humour which is nice. Overall, I encourage anyone who wants some guidance in learning Japanese to enroll in her courses. You won’t regret it. Cheers