It's a great tutorial, turning into great result in the end. However, if you have good taste, you can already do things right without having to learn any theories, because bad typography looks bad to you, and you'll keep tweaking until it looks good.
Conversely, if you don't have an eye for beauty, learning this won't give you one.
I strongly disagree. Style is a skill and can be learned like any other. Sure you might never match someone who is just naturally gifted, but anyone can achieve competence.
Conversely, if you don't have an eye for beauty, learning this won't give you one.