Kathy is a technical writer who's worked on docs for Chrome and other developer APIs at Google since 2006. Before that, she worked at Sun, NeXT, and HP. Back when the web was young, she wrote the first doc to help developers write Java applets. She also co-created The Java Tutorial and maintained it for a very long time.
Seth is a Developer Advocate with the Chrome team. He is a conference organizer (Aloha on Rails, New Game), author (Expert Spring MVC), helped publish Angry Birds for the web, and is a big fan of HTML5 and the modern web.
It's not intended as a language tutorial (after all, it is still being debated), this is often repeated; however, you'll find some pieces of code: this is real thing, not just a dream. It would be hard to explain isolates without showing some code. I would say the main goal is to demonstrate Dart is not just some funny thing that won't survive any longer, that it deserves some interest from Web developers. And it does it well!
Bottom Line Yes, I would recommend this to a friend