The great thing about there being so many Javascript transpilers these days is that you can pick the right language to suit your needs.
Really want / need Google Closure / the latest ECMAScript stuff? ClojureScript supports these things pretty well.
Really like Ruby (or Python) but find yourself in Javascript land? Coffeescript is right for you.
There's some interesting buzz around getting Coffescript more Google Closure compliant, which is probably the better way to go (assuming your targeting front end JS, not Node).
But yes, there are certainly places where Coffeescript generates a crap-ton of code, where if you can pinpoint your Javascript runtime (like in Node's case) you could do more, better, and faster.
Really want / need Google Closure / the latest ECMAScript stuff? ClojureScript supports these things pretty well.
Really like Ruby (or Python) but find yourself in Javascript land? Coffeescript is right for you.
There's some interesting buzz around getting Coffescript more Google Closure compliant, which is probably the better way to go (assuming your targeting front end JS, not Node).
But yes, there are certainly places where Coffeescript generates a crap-ton of code, where if you can pinpoint your Javascript runtime (like in Node's case) you could do more, better, and faster.