Pretty disappointed with the lack of risk with this. Conceptually seemed like something with a ton of potential, but the minute I saw the tutorial shoehorning the worst of Java and JavaScript into something new, it was a non starter for me...better being insulated writing CoffeeScript a layer up and waiting for a compiler.

Things I've noticed so far that I don't like: get/set proliferation, semicolons, braces, positional args, var for instance vars, int/num dinostyle pseudo-primitives.

It seems like they tried to do some cool things, but failed in execution. Like "Greeter.withPrefix(this.prefix);" one-line constructor definition .. where this.prefix is a "shortcut that assigns the parameter's value to the instance variable prefix". Eliminate needless code.. but instead of using a dedicated symbol to call attention to the sugar, they used "this." WTF.. did they specifically want to kill scanability.

Things I've noticed so far that I like: using "_" as a prefix to enforce encapsulation.

Enforcing naming conventions as syntax seems at least somewhat python inspired in the sense of bringing the whitespace is significant design to naming is significant.. wish there had been more of that.

If someone other than Google were doing this it would be dead in the water already.