It's good to read bits and pieces here and there, but he deviates too much into Git, Github, Heroku, Unit Testing, etc.
I want to learn Rails and Ruby. An already hard enough task.
There's no reason to smash my face into so many new concepts at once.
-Source: Myself when I starting out with Rails.
A much better source I found is the book Agile Web Development with Rails from Pragmatic Programmer Bookshelf:
http://pragprog.com/book/rails4/agile-web-development-with-r...
Starts with dumb, .html.erb files, for static HTML, then slowly builds up on previous lessons - WITHOUT GOING TOO MUCH OFF TANGENT.
Unit tests, rspec! the second coming! yada yada. I wanted to learn Rails, most newbie want that as well.