Agreed. I read a lot of tutorials, docs, and other info about Backbone. Code school was the first to help me "get it." Soon after walking through the first two chapters, I went and read the infamous annotated todo and everything made sense. Highly recommended.
(Really, in general, I'd highly recommend Code School. Likely too basic for most here, but great to pass along to that person you know just starting out or in the early intermediate stages.)