Used it. Not extensively, but I have. It adds nothing of real value for me; I have no fundamental beef with the Good Parts of JavaScript and get nothing from a Ruby-inspired hat on top.
I'd like to see something like MileScript gain some traction--not to replace JavaScript, but as another tool in the toolbox. MileScript adds new value that you don't really get with plain JS; CoffeeScript doesn't.
I'm not sure I agree--it's certainly verbose, but to me it feels more like C# verbosity (which I find helpful and often nice) than Java (which is often obfuscatory).
I'd like to see something like MileScript gain some traction--not to replace JavaScript, but as another tool in the toolbox. MileScript adds new value that you don't really get with plain JS; CoffeeScript doesn't.