Just read through the whole thing. I think it does it's job well. All of the most common questions you see, regarding reality checks, are answered in very accessible ways, just like you said.

I couldn't really find anything truly wrong with it. The only issue I had was with your explanation of MILD. While obviously correct, I found it to be a bit confusing. Mostly in the way things were worded.

Overall though, I think the Reality Check Tutorial definitely needs a little love, and this would fit the bill nicely.