The course can't be too useful. At the beginning I had expected it to be very hard to finish. After learning steps by steps, I found it easy to understand. The homework really helps me grasp the codes.
I am very grateful for Dr. Daniel Duffy and TA Avi Palley. They are not only knowledgeable and professional, but also very attentive and patient to students. Also I appreciate the forum very much, from which I learned many useful tips from other students, and I enjoy the discussion too.
I still think I have a lot progress to make, so I will keep reviewing the course and visiting the forum from time to time. Thank you all very much!