What I love most is the flexibility. The trouble with MOOCs (massive open online courses) is that they have a start-date and a set calendar and often have scheduled group projects involving an insane degree of cross-border coordination and all the classic free rider issues you might expect. Instead, with Codecademy, you can start and stop whenever you like and take it at your own pace. If you're feeling particularly geeky, you can blaze through 40 exercises in a single sitting. Likewise, if you're having a lazy day (or month...or year!), you can close your laptop, skip away into the sunset and forget about the whole thing.
Another plus is that it's all 100% practical. No long lectures to sit through - instead, you're coding from the very first minute. Now, this works for me because I've had almost 7 years of undergrad/postgrad education and I'm done with lectures. Unless they're as entertaining as they are insightful (hats off to Professor Nirmalaya Kumar and Professor Bert De Reyck at London Business School).
Of course, this doesn't mean that Codecademy will work for you. It all depends on your learning style. But if you'd like a hassle-free intro to coding to dip your toes into the proverbial pool, I'd recommend it wholeheartedly. Go on, have a go: www.codecademy.com