Pro Wide selection of courses
Coursera offers over 1000 courses on a variety of different topics. Courses are offered on learning to code and specific languages, but there is also a large selection of courses that would be beneficial to someone wanting to learn more about computer science as well (algorithms, data science, computer security) and plenty others.
Con You cannot take the full courses for free
While you used to be able to take courses for free and earn a statement of accomplishment, this is no longer the case. You can only audit the courses if you are not paying. Coursera makes it seem like you should also do the quizzes, but the submit button says "Upgrade to submit".