#Why I Don't Use CoffeeScript
CoffeeScript in of itself, and not as a transpiled language, is slick. The problem for me is what it's supposedly "fixing".
##Syntax Sugar
For a Rails and Python developer JS is ugly (as I hear). You have... dun dun dun, curly brackets and white space doesn't mean anything (oh the humanity!). But, I like my whitespace. I like not being restricted on how I write my code aesthetically. Not to mention CoffeeScript is by far less human readable than JavaScript. Programming languages, IMO, need to be a good balance of both human and machine readable. Simple example:
cube = (x) -> square(x) * x