This is the first online course I have taken, I have studied C++ in my university, but it was too simple to use in practice, just wanted to eliminate illiteracy in C++. So I took this class to improve my ability in C++, I have learned much from this course, especially in level 9, introductory computational finance, this is the first time I applied C++ in pricing option. Also, when I had problem cannot solve by myself, I just asked in the forum, my TA @APalley, always replied me quickly and gave his advice, I really appreciated him for his patience.