Some of the implementations in JS went wrong, but fundamentally it really doesn't have anything horrible going on for what it's meant to do.

Unfortunately some of the implementation details do allow for seriously horrible code and some seriously horrible traps. But if you can clear the fog, and use "the good parts", it's actually pretty nice.

As for the article, I think it's very well written and seems to have a good overview of the language. Also, the author seems to have an above average experience level in an above average number of programming languages (guessing here), so it might be worth a read.