Ruby on Rails and Office 365 Tutorial

I published a quick tutorial on writing your first Office 365 API app using Ruby on Rails. The tutorial takes you from creating a new Rails project to listing the contents of the user's Inbox using the Mail API. I'd love to get feedback on the tutorial. What do you think of the format? Does it go into enough detail, or too much? For you Ruby experts out there, did I leave any crucial information out?

Update: There's a similar tutorial here: It's essentially the same, but it has an integrated registration tool. Check it out!

Let me know what you think in the comments or on Twitter (@JasonJohMSFT).