It was good that the listview and recycler views were explained with pictures. It was a shame that there were no picture explanations for the rest. And I don't know if it's because the instructor is busy these days, but it was a shame that the answers to questions were only posted once every two days. In conclusion, I think it would be good for those who know the basic grammar of Java and have experience making a simple todolist toy homepage with JS to take this course.