It is a difficult course for me. Dr Duffy has managed to concentrate a lot of information in this short course. Because I have no programming experience, I think I spent a lot longer than others when doing the exercises.
Fortunately I managed to graduate, thanks to the TAs and classmates. People such as APalley, Trev, DDuffy are all very responsive and reply with accurate answers.
I am surprised that by the end of the course I was able to write programs with real financial applications.
If you are thinking of taking this course, beware that TAs will not give you specific answers like what the correct line of code should be. Instead they always point you to the right direction and let you think. Every time when I figured out what the real problem was and looked back at the TA's response to my problem, I discovered they saw my mistake right away but managed not to simply tell me what to delete and what to write.
It's a great course, but quite demanding. I am glad I took this course.