After finishing their Ruby course and being thoroughly impressed by the structure, the explanations and the overall approach to simplifying Ruby, I signed up for their Rails course and the Blocks and Iterators course. Just started Rails, it's a lesson you don't rush, so taking it one lesson a day. The reason it should be taken slowly is, like with their Ruby course, there are parallel projects happening while learning. That is, they teach using one app, and ask you to do another app using similar methods, so you need time to digest the information and apply it to two projects. If you have an idea for another app, you can start off on that as well. 
Meanwhile, I'm on their Blocks and Iterators course, which again deconstructs the topic beautifully with interactive, engaging diagrams/animation drawings. I take a screen shot of these drawings for future reference, like a ready reckoner of sorts.
Again,I keep wondering how did I miss this course? I remember seeing it while searching for online Ruby courses when I was caught by the coding bug, but for some reason didn't sign up. I am on Treehouse, Udemy and Tealeaf for Ruby, Rails and other courses but I strongly recommend Pragmatic Studios as the first step. I've also started re-taking the Ruby course, as a refresher, to relook at the concepts and see how I can apply them to say, a problem on Tealeaf.