The lesson is divided into four modules and for me, the best modules were second and third. The idea and concept of Design Sprint were amazing to learn and completely blew away my mind. Seriously, if I have known the concept of Design Sprint earlier, it would have saved a lot of time for us to build our product. All in all the course is a fairly a simple one and an introductory course in the field of Product Design and I was able to audit this course in almost two weeks. Cheers.