My only gripe is how all of their tutorials are too detailed. Codecademy is only geared towards brand new programmers. While it does that job very well, it’s rather tedious if you are just trying to pick up the basics of a second or third (etc…) language. I remember trying Codecademy my freshman year to check out some Java in addition to the Python I was already learning and, even then, I found it quite slow paced and boring/off-putting. Granted, this is just my personal opinion since I would much rather just start getting my hands dirty and figure it out on the go. I do think that being able to investigate and figure something out on your own (so you can start running without learning to take the baby-steps every time you want to try something new) is a very integral part of computer science in general!
Basically, if someone had never coded before, I’d highly recommend they step through an entire course on Codecademy. However, after they get that intro experience under their belt, there are better learning resources out there that can teach you the same things faster. Nothing beats a real person helping you along the way either!