Ranked in these QuestionsQuestion Ranking
Pro Provides an in-browser interpreter so you can practice while you learn
Pro Provides clearly annotated source
If you're the type who likes to really dive into the details of the tools you use, the CoffeeScript website also provides clearly annotated source for the language itself, to clear up any questions you might have.
Con Site design/format can be hard to follow
All the content is listed on one web page, with very little white space breaking lessons apart. It can be a bit difficult to follow.